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单元三答案

一1、棉布、丝绸、毛料、化纤、亚麻等

二1、推测：衣料的吸水性强弱与衣料的材质、厚薄、大小等因素有关

实验方法：把棉布、化纤、毛料三种不同的衣料，分别放入水中浸透，然后拿出来，把水挤在三个盘子里，发现棉布挤出的水最多，化纤挤出的水最少。

结果：实验说明，衣料的吸水性强弱跟衣料的材质有关。

2、涤纶布更适合做雨伞布料，因为涤纶布比较光滑，纹路密，不容易透水。

三1、（1）推测：到周围空气中去了。

（2）桌面变湿了，但是过一会，观察到桌面的水渐渐减少了，然后消失了。

（3）衣服和桌面上的水，渐渐地变少了，变成了水蒸气，扩散到周围空气中去了。

2、蒸发一般发生在液体的表面，而且在任何温度下都可以发生。

3、实验1：盘子里的水减少的快一些，瓶子里减少的慢一些，

实验2：放在火上烤的纸干的快一些。

实验3：用电风扇吹的纸干的快一些。

结论：蒸发快慢与蒸发面积的大小、温度的高低、风的大小有关。

四、1，把衣服上的水拧干后，展开，放在有风、有阳光的地方晾晒，这样衣服干的快。

2、在手和脸上涂上护肤液和保湿霜，可以减少皮肤水分的蒸发。

3、因为毛衣、棉衣厚，保暖，既可以阻止身体已有的热散发出去，又阻挡外面的冷空气进入。

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Unit 4 一．Directions: Listen to the short dialogs, then choose the correct answers to the questions. A. He is seeking help. B. He is offering advice. C. He is trying to look calm. D. He is having an interview. A. She is weak in doing projects. , B. She is weak in studies. C. She tends to work whole-heartedly. D. She is not willing to start a project. A. Send in her CV by email. B. Send in her CV by mail. C. Call the company. D. Visit the company in person. A. She has accepted the offer. ） B. She has declined the offer. C. She is interested in becoming an accountant. D. She will leave the current job for more money. A. She should keep the present job. B. She might as well find a new job. C. She might as well find an online job. D. She should perfect her present position 二．Directions: Listen to the passage(s) three times. < There are various types of questions asked at a job interview. Most job interviews start with chit-chat type of questions. They are designed to break the ice and get the conversation flowing. Examples are questions like"Did it take you long to get here","Did you find the place all right","Were you able to find parking " Most of these just require a"yes, no problem" type of response ; you can elaborate if you wish. However, ensure that you don’t provide information that will give them a bad impression . If you say something like"It took me ages to get here. The traffic was so bad; I hate traveling to this side of town", it would not make a good impression. If

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第三单元 7 献给老师的花束 1.诗中表达了对老师的热爱、感激、赞美之情。 2.多少欢聚，又多少离别，汇集在您的生命的长河。多少忧愁，又多少喜悦，交织在您的无怨的岁月。答：“欢聚”说明师生一起很融洽，很快乐，“离别”说明师生分开心情很惆怅，很不舍。无论“欢聚”还是“离别”，都表达了师生情谊深厚。 “忧愁”“喜悦”是说老师的工作有喜有忧，虽然辛苦，但老师无怨无悔，默默奉献。轻轻地放在您的窗边，默默地放在您的桌上。答：“轻轻地”“默默地”是说不想惊动了伏案工作的老师，从中体会到学生对老师的敬重，对老师的爱戴。 3.仿照诗歌第2节，用“记得”开头写几句话。举例：记得那是我交上马马虎虎写的作业，您把我喊到跟前，一点一点指出我的不足，耐心地看着我认真地重写；记得那次拔河比赛，您在旁边挥动着手臂，扯着嗓子为我们呐喊加油；记得那次我回答问题，声音细小，同学们开始讥笑我，您却保护我的尊严，肯定了我的进步！ 8 爷爷的芦笛 1.爷爷为什么要说“海边的孩子，不沾点海水就长不结实”？这体现了爷爷怎样的感情？答：爷爷这样说是希望强强能够经风雨，见世面，接受锻炼，健康成长。这体现了爷爷对强强的关爱与期盼。 2.画出描写强强心理活动的语句，说说这样描写有什么好处。（语句参看书上记号。）这些描写真实、具体地刻画了强强“紧张、焦急、恐惧、不安、企盼” 等丰富的心理。备注：环境描写、外貌描写、语言描写、动作描写、神态描写、心理活动描写相关的语句要会找，并体会它的作用。（注意联系中心来想。） 9 祝你生日快乐 1.“我”对约翰的态度有怎样的变化？为什么有这样的变化？答：“我”对约翰起初的态度是排斥的，不愿与他交朋友；后来，在与约翰的交往中，认为他是一个“令人愉快的伙伴”，决定与他交朋友；最后，“我”把约翰当做自己最好的朋友，时刻牵挂他。变化的原因是：（1）与约翰的交往让“我”逐步了解了他。（2）妈妈鼓励“我”