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ssd4-所有quiz(选择题)答案

ssd4-所有quiz(选择题)答案
ssd4-所有quiz(选择题)答案

SSD4

Quiz 1

1. How many chunks of information can working memory hold at one time?

(a) Nine

(b) One

(c) Five

(d) Three

Correct answer is (d)

See section 1.1.3 of the course notes.

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2. Which of the following is a description of Fitts's Law?

(a) The time it takes to point to a target is a constant: it takes the same amount of time to point to one target as it does to any other target.

(b) The time it takes to point to a target is directly related to the distance to that target.

(c) The action of clicking a button takes 200 msec.

(d) When calculating the time it takes to point to a target, the size of the target is not important.

Correct answer is (b)

See section 1.1.3 of the course notes.

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3. Which of the following is an implication that the characteristics of the human fovea have for the design of visual interfaces?

(a) It is important to design around the eye's blind spot, which makes it difficult to see parts of the screen.

(b) Be careful when using blinking text or animations because they naturally draw the user's attention.

(c) Because the fovea encompasses only 2 degrees of visual angle, all text should be concentrated in a small area of the screen.

(d) There are no design implications.

Correct answer is (b)

See section 1.1.3 of the course notes.

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4.According to the information processing model of human cognitive activity, which of the following happens to information from the outside world immediately after it is perceived by the perceptual processor?

(a) The cognitive processor determines that an action needs to be taken.

(b) The motor processor completes an action based on the information.

(c) It is deposited into working memory.

(d) It is deposited into long-term memory.

Correct answer is (c)

See section 1.1.3 of the course notes.

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5. Feedback from users of the software systems we build is useful, and even necessary. This is because such feedback

(a) pleases users by showing that we are interested in their opinion.

(b) helps us select the best of our users.

(c) helps us assign blame among the programmers in our team.

(d) is the only way to discover unforeseen shortcomings of our software.

Correct answer is (d)

See section 1.1.1 of the course notes.

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6. Software companies often release so-called "beta" versions of software. A beta version of a program is usually given away to a selected group of users who agree to test and comment on the program before it is released to the wider market. A company that releases beta versions is thus engaging in

(a) iterative design.

(b) leverage of affordance.

(c) word-of-mouth advertising.

(d) aggressive marketing.

Correct answer is (a)

See section 1.1.1 of the course notes.

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7. The event-redraw loop is

(a) an affordance commonly found in drawing programs.

(b) a programming construct used in redrawing event objects on the screen (e.g., a meeting in a scheduling program).

(c) a built-in Java method invoked when you throw an exception for a visible icon.

(d) the main programming construct of interactive programs.

Correct answer is (d)

An interactive program listens for events and reacts to them. The reaction usually involves some redrawing of the screen. Because a responsive program needs to listen for events constantly,

even while it does other things, this event-redraw loop has to be the main construct of the program into which all other functions are incorporated. See section 1.1.2 of the course notes.

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8. When, on your computer screen, you drag the image of a folder to a different window, you are

I.directly manipulating the bits of the disk file.

II.manipulating an image that represents the bits of the disk file.

III.generating mouse events that cause the windows interface program to redraw the image of the folder continuously, in different locations, as it appears to move.

(a) III only.

(b) II and III only.

(c) II only.

(d) I only.

Correct answer is (b)

See section 1.1.2 of the course notes.

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9.Your supervisor has requested that you use a toolkit to build a fancy new user interface, and she has given you the following reasons to do so (besides enticing you with a promise of a pay raise): I.Toolkits have widgets that allow you to generate prototypes rapidly.

II.If you use the same toolkits, all of the programs you write will have interfaces with a similar look and feel.

III.The Internet requires that we use the prescribed open-standard UI toolkits.

Which of the reasons are sound? (Again, besides the pay raise!)

(a) I only.

(b) I and II only.

(c) II only.

(d) II and III only.

Correct answer is (b)

See section 1.1.2 of the course notes.

Quiz 2

1.Valid Visual Basic data types include which of the following?

I.Boolean

II.String

III.VariantType

(a) II and III only

(b) I and II only

(c) I, II, and III

(d) I only

Correct answer is (c)

See page 165 of your textbook.

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2. Which of the following lines contains only valid Visual Basic equation operators?

I.- + * /

II.\ ^ Mod

III.- + * / \ ^ >>

(a) I, II, and III

(b) I and II only

(c) II and III only

(d) I and III only

Correct answer is (b)

See page your textbook.

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3.In Visual Basic, what types of variables should you use when storing numbers with decimal fractions?

I.variant, string, or object

II.single, double, or decimal

III.integer, long, or Boolean

(a) II only

(b) I and III only

(c) III only

(d) I only

Correct answer is (a)

See your textbook.

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4. At run time, you want to change the appearance of a Visual Basic control named "cmdExit" so that it appears "flat." "cmdExit" belongs to the form named "frmInput." Which of the following statements would you use?

(a) cmdExit.FlatStyle.frmInput = FlatStyle.Flat

(b) cmdExit.FlatStyle = FlatStyle.Flat

(c) cmdExit.FlatStyle("Flat")

(d) cmdExit.FlatStyle = Flat

Correct answer is (b)

See page 132 of your textbook.

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5.An Option Explicit On statement in a form's General Declarations section causes Visual Basic

(a) to assign a string data type to all undeclared variables.

(b) to require that Dim and Public statements have As data type clauses.

(c) to initialize string variables with zero-length strings.

(d) to flag undeclared variables as errors at compile time.

Correct answer is (d)

See pages 171–3 of your textbook.

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6.The Code window of a Visual Basic object can be opened by selecting the object and

(a) clicking the right mouse button.

(b) double-clicking the left mouse button.

(c) pressing Ctrl-F1.

(d) pressing F12.

Correct answer is (b)

See page 60 of your textbook.

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7.Which of the following are valid Visual Basic variable names?

I.curAccounts Receivable

II.3ndPlaceEntrystr

III.Month_To_Datedbl

(a) I and III only

(b) I, II, and III

(c) III only

(d) I only

Correct answer is (c)

Month_To_Datedbl is a valid name even though it does

not follow the conventions suggested in the textbook.

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8. In Visual Basic, which of the following Val function statements will return a value equal to or less than 32?

I.Val("32,543,987")

II.Val(".98")

III.Val("thirty-seven")

(a) I and II only

(b) II only

(c) I, II, and III

(d) II and III only

Correct answer is (c)

See page 143 of your textbook.

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9. A TOE chart is

(a) a grid used to correlate the names of local, form-level, and global variables with their properties.

(b) the verbal equivalent of a flowchart.

(c) a technique for planning object-oriented, event-driven applications by creating a table that correlates proposed tasks with corresponding objects and events.

(d) a rough sketch of a planned interface.

Correct answer is (c)

See page 97 of your textbook.

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10.Which of the Visual Basic control properties listed below holds the value you will use when setting other properties of the same control from an event handler?

(a) Caption

(b) Index

(c) Tag

(d) (Name)

Correct answer is (d)

See your textbook.

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3.With which of the following do developers specify the task or tasks a Visual Basic control is to perform when a user manipulates it?

(a) TOE tables

(b) flowcharts

(c) behavior properties

(d) code

Correct answer is (d)

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10.The Visual Basic Properties window allows the developer to

I.change a Visual Basic object's appearance.

II.change a Visual Basic object's behavior.

III.change a Visual Basic object's name.

(a) I, II, and III

(b) I only

(c) II and III only

(d) II only

Correct answer is (a)

See your textbook.

Quiz 3

1.Which of the following is a similarity between the heuristics Consistency and Standards and Match Between the System and the Real World?

(a) There is no similarity.

(b) Both advocate ignoring the users' experiences with other software.

(c) Both draw upon the users' prior knowledge and experience.

(d) Both recognize the tendency of users to make errors.

Correct answer is (c)

See section 1.3.1 of the course notes.

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2.While reading email, a user encounters the following message just before his email program crashes:

The exception Integer division by zero (0x00000094)

occurred in the application at location 0x69591070.

Click OK to terminate the application.

Which of the following heuristics are violated by the behavior of this email program?

(a) Visibility of System Status

(b) Recognition Rather Than Recall

(c) Aesthetics and Minimalist Design

(d) Match Between System and the Real World

Correct answer is (d)

See section 1.3.1 of the course notes.

(a) The application is clearly keeping the user informed as to the status of the system, so therefore this heuristic is not violated.

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3.Which of the following describes the most appropriate use of the technique heuristic evaluation?

(a) Evaluating the usability of a design in its final stages

(b) Critiquing the designer of a system

(c) Evaluating the usability of a design in its early stages

(d) Advising people during a therapy session

Correct answer is (c)

See section 1.3.1 of the course notes.

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4. By which of the following criteria should we select the participants in a think-aloud usability test?

(a) Experience with the system being tested.

(b) Experience with the development process.

(c) Similarity in experience to the people who are expected to use the final version of the system.

(d) Availability at the time of the test (to avoid stress in the participants).

Correct answer is (c)

See section 1.3.2 of the course notes.

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5.Which of the following are differences between the techniques of heuristic evaluation (HE) and think-aloud usability testing (TA)?

I.A heuristic evaluation can be carried out on a paper prototype, whereas a TA requires a functioning prototype.

II.A heuristic evaluation can be conducted by an expert analyst working alone, whereas a TA requires the participation of people who are like the application's intended users.

III.TAs require the developer to 'think like a user,' whereas HEs do not.

(a) II

(b) I and III

(c) I only

(d) I, II, and III

Correct answer is (a)

See section 1.3.2 of the course notes.

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6.Which of the following, if any, accurately describe the relationship between the evidence and explanation sections of a usability aspect report?

I.Explanation is the author's interpretation of objective evidence.

II.Explanation explains a solution to the problem that the evidence section describes.

III.Explanation links the problem described in the evidence section to instances of the problem discovered in the past.

(b) I, II, and III.

(c) I only.

(d) III only.

Correct answer is (c)

See section 1.3.3 of the course notes.

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7.In the context of writing a usability aspect report, what is meant by the statement:

"Always step back and try to see the bigger picture."

(a) A usability aspect report should be no longer than one page.

(b) Looking for patterns in usability problems is an important step in the analysis process.

(c) It is important not to waste time on insignificant usability problems.

(d) Usability aspect reports should be grouped by where they were found in the program.

Correct answer is (b)

See section 1.3.3 of the course notes.

(c) There are no insignificant usability problems!

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8.Which section of a usability aspect report (UAR) can serve as the UAR's "name"?

(a) Succinct description of the usability aspect

(b) Evidence for the aspect

(c) UAR Identifier

(d) Explanation of the aspect

Correct answer is (a)

See section 1.3.3 of the course notes.

(c) The ID number, not the name, should appear in this section.

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9. Which of the following are reasons why it is necessary that usability aspect reports be clear and complete?

I.The usability problem may need to be described to other members of the development team who did not see the problem first-hand.

II.The author of the reports needs to be able to understand them long after they are written.

III.The participants in a user study need to be able to read accounts of their sessions written in lay terms.

(a) I only

(b) I and II

(c) III only

Correct answer is (b)

Participants in user studies have no need to see the resulting UARs. I and II are correct, III is not.

Quiz 4

1.Which Visual Basic control property's value is used as the identifier for the control in the code?

(a) BackStyle

(b) Caption

(c) Appearance

(d) (Name)

Correct answer is (d)

See section 2.1.1 of the course notes.

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2.Which of the following approaches to user interface design follow the heuristic match between the system and the real world?

I,Use the same vocabulary the user would use to describe things.

II,Find a metaphor that describes aptly a useful portion of the computer's behavior.

III,Don't clutter the screen with blinking animations.

(a) I, II, and III

(b) I only

(c) I and II only

(d) II only

Correct answer is (c)

See section 2.1.2 in the course notes.

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3. Which of the following common intuitions can fruitfully be applied in user interfaces?

I,If B immediately follows A in time, B is caused by A.

II,If B is bigger than A, B is more important than A.

III,If B is near A, B is somehow related to A.

(a) I only

(b) III only

(c) II and III only

(d) I, II, and III

Correct answer is (d)

See section 2.1.2 of the course notes.

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4.Which of the following situations violates the heuristic visibility of system status?

(a) A computer system that appears to have crashed.

(b) A progress indicator showing how much of a file is left to download

(c) The full Recycle Bin icon showing that the bin has files in it

(d) The MS Windows taskbar showing the applications that are running

Correct answer is (a)

See section 2.1.3 of the course notes.

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5.Which of the following lines contains only valid Visual Basic equation operators?

I,- + * /

II,\ ^ Mod

III,- + * / \ ^ >>

(a) II and III only

(b) I and III only

(c) I and II only

(d) I, II, and III

Correct answer is (c)

See page your textbook.

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6.The Code window of a Visual Basic object can be opened by selecting the object and

(a) clicking the right mouse button.

(b) pressing F12.

(c) double-clicking the left mouse button.

(d) pressing Ctrl-F1.

Correct answer is (c)

See page 60 of your textbook.

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7.Which of the following are valid Visual Basic variable names?

I,curAccounts Receivable

II,3ndPlaceEntrystr

III,Month_To_Datedbl

(a) III only

(b) I and III only

(c) I, II, and III

(d) I only

Correct answer is (a)

Month_To_Datedbl is a valid name even though it does not follow the conventions suggested in the textbook.

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8.An Option Explicit On statement in a form's General Declarations section causes Visual Basic

(a) to flag undeclared variables as errors at compile time.

(b) to assign a string data type to all undeclared variables.

(c) to initialize string variables with zero-length strings.

(d) to require that Dim and Public statements have As data type clauses.

Correct answer is (a)

See pages 171–3 of your textbook.

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9.Which of the Visual Basic control properties listed below holds the value you will use when setting other properties of the same control from an event handler?

(a) (Name)

(b) Caption

(c) Index

(d) Tag

Correct answer is (a)

Quiz 5

1. When you click the mouse on a Visual Basic control named panicButton which of the following is invoked?

(a) panicButton_Click()

(b) Click_panicButton()

(c) myPanicButton_Click()

(d) panicButton-Click

Correct answer is (a)

See section 2.2.1 of the course notes.

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2.In Visual Basic, you can create a keyboard shortcut for a button by

(a) with a Dim statement in the modules general procedures section.

(b) using a special Visual Basic method (a procedure that acts on an object) to assign a shortcut character to the button.

(c) placing an "&" (ampersand) in the button's caption immediately in front of the shortcut character.

(d) placing an "_" (underline character) in the button's identifier in its Name property.

Correct answer is (c)

See section 2.2.1 of the course notes.

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3. Because Visual Basic buttons can only be manipulated in one way (by clicking), they are suitable to be used for

(a) actions that require additional information not supplied by the click

(b) mouse-initiated actions only

(c) a greater variety of actions than most other controls

(d) actions that require no additional information beyond that supplied by the click

Correct answer is (d)

See section 2.2.1 of the course notes.

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4. Is the consistency and standards heuristic violated by an application with a menu called Actions instead of File?

(a) Yes, the application does not follow accepted conventions.

(b) Consistency and standards is not applicable in this situation.

(c) No, if the other menus are also named differently from accepted conventions.

(d) No, if the Actions menu contains similar menu items to File menus in other applications.

Correct answer is (a)

See section 2.2.2 of the course notes.

(c) This concept is not what is meant by 'consistency'

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5. Which of the following is an appropriate time to do an error analysis?

(a) Two or more heuristics give conflicting advice about a particular interface element.

(b) One of your colleagues found heuristic violations that you did not.

(c) Your client disagrees with your findings.

(d) You think you have made a mistake in your usability aspect report.

Correct answer is (a)

See section 2.2.2 of the course notes.

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6. Which heuristic is described in the following statement?

Information that is the same should appear to be the same (same words, icons, and position on the screen). Information that is different should be expressed differently.

(a) Flexibility and efficiency of use

(b) Consistency and standards

(c) Visibility of system status

(d) Help and documentation

Correct answer is (b)

See section 2.2.2 of the course notes.

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7. Which of the following is an example of a typical accelerator for frequently used operations?

(a) scrolling by using the keyboard arrow keys instead of the scrollbars

(b) increasing the speed with which the mouse moves

(c) function or command keys which combine an entire command into a single keypress

(d) typing (or clicking) the next input before the computer is ready to accept it

Correct answer is (c)

See section 2.2.4 of the course notes.

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8.Which of the following is an advantage of keyboard accelerators?

(a) There is no standard for visual cues for keyboard accelerators.

(b) Accelerators are easy for novice users to remember.

(c) Accelerators allow experts to learn to use the application more quickly.

(d) A user may operate them without his hands leaving the keyboard.

Correct answer is (d)

See section 2.2.4 of the course notes.

(b) Accelerators are intended for more expert users.

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9. An interface with no "Undo" would

(a) be able to save files more often.

(b) help people learn not to make frequent mistakes.

(c) be less predictable.

(d) impair the user's natural ability to learn by doing.

Correct answer is (d)

See section 2.2.3 of the course notes.

(c) The opposite is in fact true. Undo cannot always be applied, which is a little confusing.

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10. When does the presence of an available Cancel button violate the heuristic visibility of system status?

(a) When it is physically set apart from other actions within the interface.

(b) An available Cancel button never violates this heuristic.

(c) When pressing the Cancel button undoes the previous action.

(d) After the user has clicked an Apply button, and there are no changes that the Cancel button can undo.

Correct answer is (d)

See section 2.2.3 of the course notes.

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11. A reference from one UAR to another is established when

I,the analyst remembers a similar previous case.

II,new problems are uncovered by thinking about the trade-offs of solutions.

III,a sufficient number of UARs has been written for one heuristic.

(a) I and II only

(b) I only

(c) I, II, and III

(d) II only

Correct answer is (a)

See section 2.2.3 of the course notes.

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12, Which of the following features are designed to accelerate user interaction?

I,History list in Web browsers.

II,Bookmarks.

III,List of shortcuts to recently used files

(a) I only

(b) I, II, and III

(c) I and II only

(d) II and III only

Correct answer is (b)

See section 2.2.4 of the course notes.

13,A Visual Basic button will hold the focus when the interface is first presented to the user, if I,its Default property is set to "true".

II,its TabStop property is set to "true" and its TabIndex property is set to "0".

III,its TabIndex property is set to "0".

(a) I only

(b) I and III only

(c) III only

(d) II only

Correct answer is (d)

See section 2.2.1 of the course notes.

Quiz 6

1. A heuristic used in evaluating prototypes of a user interface:

(a) should be carefully criticized before use.

(b) endorses or criticizes the interface as a whole.

(c) unambiguously endorses or criticizes the aspect of the interface to which it applies.

(d) may occasionally both endorse and criticize one aspect of the interface.

Correct answer is (d)

See section 2.4.1 of the course notes.

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2. Which of the following heuristics are violated by the Date/Time Control Panel Time Zone ListBox?

I,Visibility of system status

II,Consistency and standards

III,Aesthetics and minimalist design

(a) I, II, and III

(b) II and III only

(c) I and II only

(d) III only

Correct answer is (b)

See sections 2.2.2 and 2.4.2 of the course notes.

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3. In Visual Basic, which of the following CheckBox states can a user set interactively by directly manipulating the control?

I,Unchecked

II,Checked

III,Grayed

(a) II and III only

(b) I, II, and III

(c) I and II only

(d) I only

Correct answer is (c)

See section 2.3.1 of the course notes.

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4. Which of the following is an example of error prevention in an interface?

(a) Checking that the window is not covered by another before displaying a menu.

(b) Allowing users to select an item from a list rather than type the name of the item.

(c) Not letting a novice user use a keyboard shortcut.

(d) Checking all application variables for inconsistencies, after a change to the value of one of them is attempted by the user.

Correct answer is (b)

See section 2.3.2 of the course notes.

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5. Which of the following interface features does the error prevention heuristic warn us to avoid?

I,Commands that are very similar

II,Messages that contain double negatives

III,Tabbed dialog boxes

(a) III only

(b) I and II only

(c) I, II, and III

(d) I only

Correct answer is (b)

See section 2.3.2 of the course notes.

6.Which of the following are true of Checkbox controls:

I,Checkboxes are most commonly used to allow users to turn the options of larger interfaces on and off.

II,Checkboxes allow users to toggle only two states interactively: checked and unchecked.

III,A user cannot directly set a Checkbox to the Grayed state interactively.

(a) I only

(b) I and II only

(c) I, II, and III

(d) II and III only

Correct answer is (c)

See section 2.3.1 of the course notes.

7. Into which Visual Basic event handler would you insert code to record the fact that the user has selected "CrystalWare(TM) Playback" in this figure?

(a) lstDevice.Selected

(b) lstDevice_Scroll

(c) lstDevice_Click

(d) lstDevice.Scroll

Correct answer is (c)

See section 2.4.1 of the course notes.

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8,Which of the following is an example of a description error as it relates to the heuristic error prevention in an interface?

(a) buttons with icons but no textual labels

(b) case-sensitive commands

(c) hyperlinks that are not descriptive of the pages to which they link

(d) a very long dropdown list

Correct answer is (b)

See section 2.4.2 of the course notes.

(c) This has more to do with visibility of system status than error prevention.

Quiz 7

1.Which of the following is a way that the Windows 98 Date/Time control panel violates the heuristic help and documentation?

I,Help messages disappear when the user clicks elsewhere.

II,There is no help available.

III,Help messages appear in a completely separate window.

(a) I only

(b) II only

(c) III only

(d) I and III

Correct answer is (a)

See section 2.7.1 of the course notes.

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2.Which of the following is a reason that adhering to the heuristic recognition rather than recall when designing interfaces is a good idea?

(a) Computers are better at remembering things precisely; people are better at recognizing something that is shown to them.

(b) People have no trouble at all remembering things exactly.

(c) Forcing users to memorize commands is good mental practice.

(d) It takes too long for users to recall commands from memory.

Correct answer is (a)

See section 2.7.1 of the course notes.

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3.How does online help better satisfy the heuristic help and documentation than paper manuals?

(a) Paper manuals are always available and easily searchable.

(b) Online help can give more concrete advice than paper manuals.

(c) Online help is always available and easily searchable.

(d) People use paper manuals only when they have no other recourse.

Correct answer is (c)

See section 2.7.1 of the course notes.

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4.Does the presence of a status indicator as a file is downloading support or violate the heuristic help users recognize, diagnose, and recover from errors?

(a) It supports the heuristic by informing users when a problem has occurred with the download.

(b) It supports the heuristic by allowing users to choose whether or not to pay attention to the indicator.

(c) It violates the heuristic by providing users with more information than they can deal with at one time.

(d) It violates the heuristic by providing unhelpful information.

Correct answer is (a)

See section 2.7.2 of the course notes.

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5. Which of the following are true of Visual Basic Textbox controls?

I,They can be set to hide the characters that are entered into them, allowing them to be for password entry.

II,They can be set to display either a single line of text or multiple lines.

III,They support keyboard editing of text but not conventional mouse select-edit functions.

(a) I and II only

(b) III only

(c) I, II, and III only

(d) II and III only

Correct answer is (a)

See section 2.5.2 of the course notes.

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6.Which of the following are true of Visual Basic scrollbar controls?

I,They are not typically used for tasks where particular or exact values are needed.

II,They can be manipulated in three ways: by clicking their arrow buttons, by clicking and dragging their "thumb," and by clicking anywhere on the bar between their "thumb" and arrow buttons.

III,They are represented on the toolbox palette by two icons.

(a) I and III only

(b) II and III only

(c) I and II only

(d) I ,II, and III

Correct answer is (d)

See section 2.5.2 of the course notes.

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7.To determine if a Visual Basic control is actually in a container control and not merely "floating" over it, one can

I,move the container control to see if the control in question moves with it.

II,check to see if the control in question's AutoBuddy property is set to the name of the container control.

III,move the control in question to see if it is limited to staying within the borders of the container control.

(a) II and III only

新视野大学英语四listeningquiz1--book4题目及答案

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A Part 5 Compound Dictation (每小题: 1 分; 满分:10 分) passed passed occupied occupied aware aware prevous previous take up take up advanced advanced recording recording all of the in his dary All of the thoughts that came to mind got put down in his diary when her husband when her husband stopped his habit of leaving his diary around in places she was tempted to open it and see what information she could find inside she was tempted to open it and see what information she could find inside Part 6 Cloze (with four choices provided) (每小题: 1 分; 满分:20 分) reckon set up revolve Much of accomplished preserve build reconcile admitted wreck a few agreeable communicated blossom naturally realistic drained acknowledge pledging customary Part 7 Skimming and Scanning (Multiple Choice + Blank Filling) (每小题: 1 分; 满分:10 分)

新编大学英语综合教程1_unit6

Unit 6 A World of Mystery In-Class Reading The Bermuda Triangle 百慕大三角 1 1945年12月5日,佛罗里达州的劳德代尔堡,天气晴朗,由五架美国海军飞机组成的第19飞行分队从这里起飞。机上共有14名机组人员。飞机状况良好;机上装有当时最好的设备, 包括罗盘和无线电设备,还携带有救生筏。飞机可以在水上漂浮90秒钟。飞机起飞一个半小时后,劳德代尔堡的指挥塔台听到了从其中一架飞机传来的无线电信息。 2 “我不知道我们现在所处的位置。”  3 之后飞机再也无法和指挥塔台通话,但是飞机之间可以通话,而且指挥塔台也能听到他们 的通话。 4 “磁罗盘简直疯了。”  5 “我们完全迷失了方向。”  6 从这之后没有收到其他任何信息。再也没有其他任何人收到过这些飞机的消息或看到过它 们。300架飞机和许多船只搜索了该地区,但没有找到第19飞行分队的任何踪迹。而且其中 一架被派去搜寻的飞机也彻底失踪了。 7 这些飞机是在西大西洋上一个非常神秘的地方失踪的,在这里已经发生了许多奇怪的事 件。这种神秘现象在1945年之前很久就已经出现了,而且自那一年以来,又有许多其他船只和飞机在这一地区失踪。这一地区被称为百慕大三角,是大西洋上一个巨大的三角形海域, 其北端是百慕大岛。 8 飞机和船只在世界的其他地方也会失踪,但是百慕大三角发生的失踪事件要比其他地区 多。多年来科学家们和其他人士对这一神秘现象感到困惑不解。人们做了许多努力,试图解释为什么有这么多的人、飞机和船只在这里失踪。 9 作家约翰·斯宾塞认为,这些船只和飞机被来自另一行星上的飞碟或不明飞行物从海上和 空中劫走了。他的看法是,既然宇宙里有数百万其他行星,那么在宇宙中的某些地方肯定存 在其他有智慧的生物。这些生物喜欢收集人类及其设备,以便仔细观察研究。 10 另一种理论认为,该地区的地理状况是造成船只和飞机失踪的罪魁祸首。百慕大位于地 震带。水下地震导致巨浪突然涌现。这些波浪如此巨大,足以将船只撕成碎片。在空中,由 于突然出现的强风,飞机也会遭遇到类似的厄运。 11 和第19飞行分队一样,许多船只和飞机也曾报告说, 他们的磁罗盘在百慕大三角海域失灵。通常磁罗盘指向磁北极。但是在地球上有两个地方罗盘刚好指向真北,百慕大三角就是其中之一。因此,这一地区的磁性有些怪异。 12 许多人认为这些解释难以置信。而最新的一种理论具有科学根据,因而比较可信。百慕 大海底甲烷的发现促使科学家麦克维尔博士思考如何解释这些神秘现象。(他认为)有时大量甲烷气体会从海底逸出,升入空中。这可能在海面产生巨浪从而使船只沉没。甲烷和空气混合还可能引起船上发动机停转或者起火。同样,甲烷与空气的混合物升入空中会引起飞机 发动机停转或爆炸。而爆炸会把船只或飞机炸成极小的碎片。 13 这一最新理论仍有待证实,但它似乎给第19飞行分队以及所有其他的飞机、船只和人员 为什么会在百幕大三角失踪提供了一种更好的解释。

新视野大学英语视听说教程第三册-quiz2-答案

Part I Directions: Listen to the short dialogs, then choose the correct answers to the questions. You will hear the recording twice. After the first playing, there will be time for you to choose the correct answers. Use the second playing to check your answers. 1. (Listen to the audio recording for the question.) A. He missed home at first and then got used to studying there. B. He missed home and has never done well in studies. C. He studies well and never misses home. D. He studies well though he always misses home. Your answer Correct answer A A 2. (Listen to the audio recording for the question.) A. Write a statement for the woman. B. Revise what the woman will write. C. Fill in forms for the woman. D. Apply to an American university for admission. Your answer Correct answer B B 3. (Listen to the audio recording for the question.) A. The grading system there is different. B. The teaching methods there are different. C. Both A) and B). D. Neither A) nor B). Your answer Correct answer C C 4. (Listen to the audio recording for the question.)

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