Today, ultrasonic(超声的) waves are being put to work in laboratories and factories. If an ultrasound generator is placed in a liquid, the waves move the liquid back and forthhundreds of thousands of times each second. This causes materials to mix quickly or to dissolve(使分解，使溶解) in liquids. Paint manufacturers(制造商) use ultrasound to do a better job of blending colors. The companies that make film for your camera find that mixing chemicals by the use of sound waves will produce a more sensitive film.

The new lightweight(轻量的) type of washing machine uses ultrasonic waves to get

clothes clean. Its special ultrasound generator is put into a pail of soapy water containing the soiled clothes. The sound waves drive the soapy water back and forth through the

cloth so fast that everything is soon clean. There is also a new kind of dishwasher that works in much the same way.

Ultrasonic waves can shake a liquid so fast that tiny holes form all through it. The

liquid is actually torn apart by this action. Almost as soon as these holes are made, they fall together again. The result is a powerful pounding action. In the dairy industry this is used for the double purpose of making homogenized(使均匀，使匀质) milk and sterilizing(使无菌) it at the same time. If you look at some raw milk with a microscope, you find that it is made up of little drops of butter fat floating around in a watery liquid. In order to make milk easier to digest, these fat droplets(微粒) may be broken up by forcing the milk through very small openings. The result is called homogenized milk. When the ultrasonic method is used, the sound waves not only break up the droplets but also kill the germs in the milk by pounding them to pieces.

1.Why does a paint manufacturer use ultrasound to do a better job of blending colors?

A. Because it is cheap to use ultrasound to blend colors.

B. Because the waves move the liquid so quickly that it can make materials mix quickly or dissolve in liquids.

C. Because they can mix chemicals by the use of sound waves.

D. Because the waves can clean the paint.

2.What properties does ultrasound wave have?

A. Homogenizes and sterilizes the milk.        B. Mix materials and break droplets.

C. Kill germs and sterilize milk.              D. Move liquids quickly.

3.What exists in the raw milk?

A. Little drops of butter fat.               B. Small holes.

C. Fat droplets and germs.                D. Chemicals.

4.Where is ultrasound wave not used?

A. In the paint manufacture.                  B. In the shop mixing bread flour.

C. In the film-making company.           D. In the dairy industry.

VI、书面表达(共25分)
假设你是Angela, 你的朋友Hilary向你询问如何保持健康。请你给她发一个邮件提些建议。内容要点如下:
1. 注意合理饮食。多吃鱼、肉、豆类等,特别是新鲜蔬菜和水果, 不要吃太多甜食。
2. 注意锻炼身体。劳逸结合, 多参加体育活动。
3. 保证充足的睡眠。不要熬夜,每天至少睡8个小时。
注意: 词数:100左右; 可适当增加细节,以使行文连贯; 邮件的开头已写好。
Dear Hilary,
How nice to hear from you! In your letter you asked me how to keep healthy
­­­­­­­­­­­­­­­­­­­­                                                                                                                               Yours,
　　　　　　　　　　　　                                  Angela

第二节　书面表达(满分25分)

高中生活是人一生中最美好的时光，除了学业之外，我们还经历、感悟了许多。为了在毕业前不留下遗憾，我们搞好备考复习的同时，是不是还该做点什么？请根据提示的要点写一篇英语短文，谈谈你的想法。

·向老师表示感谢

·跟对你有误解的同学谈一谈

·征求同学的宝贵意见

·再为班级做件有意义的事

注意：1.可适当加入细节，以使行文连贯；

2.短文的单词数：100左右(开头已给出的单词不计入单词总数)。

High school is regarded as the best time of my life. Besides classes and homework， there's something more that I especially treasure. In order to leave school with no regrets，

VI、书面表达(共25分)

假设你是Angela, 你的朋友Hilary向你询问如何保持健康。请你给她发一个邮件提些建议。内容要点如下:

1. 注意合理饮食。多吃鱼、肉、豆类等,特别是新鲜蔬菜和水果, 不要吃太多甜食。

2. 注意锻炼身体。劳逸结合, 多参加体育活动。

3. 保证充足的睡眠。不要熬夜,每天至少睡8个小时。

注意:  词数:100左右;  可适当增加细节,以使行文连贯;  邮件的开头已写好。

Dear Hilary,

How nice to hear from you! In your letter you asked me how to keep healthy

????????????????????????????????????????                                                                                                                                 Yours,

　　　　　　　　　　　　                                  Angela

假如你是李华，是一名高三学生，升入高三以来，你班不少同学感到学习压力与日俱增。为了缓解学生的紧张情绪，英语老师鼓励你们在博客上告诉父母自己的心里话。内容包括：

感谢父母的养育之恩；

对未来大学生活的向往；

打算怎么努力实现自己的目标。

注意：

词数：120左右

可适当发挥，以使行文连贯通顺。