我国控制机动车尾气污染采取的技术路线是先怠速法，（）。A、自由加速法B、再强制装置法

阅读表达。

     阅读下面短文，并根据短文后的要求答题(请注意问题后的字数要求)。

［1］If you are worried about things and are under a lot of stress at work or school,then you are

prob-ably not sleeping well. Worry can keep you awake,tossing and turning in bed until the early hours

of the morning when you eventually fall asleep. When you wake up,you don't feel refreshed,but tired and

worn out and unable to face a new day.

［2］ Dr. Henry Winkle,i n a recent newspaper article entitled Stress and Sleep,indicates that       .Dr.

Winkle says,"The more we worry,the less we sleep,the more we are unable to deal with stress. If  we

can find a way to get a good night's sleep,"he adds,"we can often find the energy to deal with what's

worrying us."

［3］So,what is a good night's sleep? Research shows that the amount of sleep which people need in

order to keep healthy varies a lot. Seven hours is about the average amount,though strangely enough,

sleeping longer often gives you a headache instead of making you feel more refreshed.

［4］Dr. Winkle believes that preparing for sleeping is important. People who work late should try to

give themselves a short break and do something restful before going to bed. This could be watching TV

or listening to music. Doing some exercise earlier in the day should help you to feel physically as well as

mentally tired. A bedtime drink can also help,but coffee or tea should be avoided as they contain caffeine

and will keep you awake.

［5］ "When you put the light out," Dr. Winkle says,"concentrate on relaxing your muscles,working

slowly up from your feet,and you 'll be asleep before you know it."

1. What is the main idea of the text? (no more than 5 words)

2. Complete the following statement with words from Paragraph 2. ( no more than 3 words)

People shouldn't go to sleep immediately but should           after working late in the night.

3. Point out the disadvantage of drinking coffee and tea before going to bed. (no more than 6 words)

4. Fill in the blank in Paragraph 2 with proper words. (no more than 10 words)

5.What does the word "it" (Line2,Paragraph5) probably refer to? (no more than 3 words)

电焊机的接地线属于（）。

A.工作接地

B.保护接地

C.安全接地

D.防干扰接地

对缺铁性贫血无症状表现的缺铁期具有早期诊断价值的指标为（）。

A.血清铁蛋白

B.血清铁

C.贮存铁

D.总铁结合力

E.血红蛋白

What is the probable relationship between the two speakers
[A] Teacher and student. [B] Doctor and patient. [C] Husband and wife.

制动总泵应动作灵敏、可靠、无（）现象。

A.失灵

B.失效

C.泄露

D.失控