保证地下防水工程施工质量的重要条件是施工时( )。 A．环境温度不低于5℃ B．

阅读理解。

     If you go to a fast food restaurant, you will probably see a lot of teenagers. Today, many teenagers

are overweight, and some of this because of their bad eating habits. Most teenagers love food with a lot

of fat, oil, salt, and sugar. People often call this kind of food "junk food".

     But bad eating habits go beyond fast food. We find many teenagers eat unhealthily. Some don't have

breakfast before they go to school. During the day, some don't have a proper meal for lunch. In a recent

survey  at one school , scientists found that  over  two thirds of   the students didn't follow a healthy diet.

They didn't like vegetables, and many of them didn't like fruits. They preferred to eat food with a lot of

salt, sugar, or fat.

     Parents today also worry about their children's diet. Some doctors give the following advice:

     Teenagers shouldn't eat too much junk food.

     Teenagers shouldn't eat food with too much salt. Salt can cause high blood pressure in the future.

     Teenagers should eat food with less fat, oil, and sugar.

     Teenagers need to eat some fruits and vegetables every day. fruits and vegetables are rich in vitamins

and have little fat.

     Teenagers need to drink more milk. Milk will help their bones grow.

     Teenagers need to eat breakfast every day. This is good for their body and mind

1. "Junk food" contains a lot of __________.  

A. milk and sugar                        

B. fruits and sugar  

C. vegetables and salt                    

D. fat, oil, salt, and sugar

 2. In a recent survey at one school, scientists found many students liked ________.

A. vegetables      

B. unhealthy food      

C. fruits        

D. salt, sugar, or fat

3. What does the underlined word "beyond" mean in Chinese in this passage? 

A.超出          

B.不如              

C. 相等        

D. 在后面

4. In this passage, doctors think the tanagers should eat more _________.

A. food with no vitamins  

B. breakfast    

C. vegetables and fruits  

D. salt and oil

5. The best title for this passage is _________.

A. Bad habits    

B. Junk food      

C. Unhealthy food  

D. Advice on healthy eating

《担保法》规定，动产质押的质押合同自（）生效。

A、签订之日起

B、登记之日起

C、约定之日起

D、质物移交于质权人占有时

科学技术的发展每10年经历一次大变革，第（）次是以蒸汽的释放与利用为标志的。

A、一

B、二

C、三

D、四

引起脑萎缩的最常见原因是( )。

A．脑水肿

B．脑外伤

C．脑动脉粥样硬化

D．脑脓肿

E．脑结核

32岁女性，发现糖尿病5年，原发不孕，月经失调半年，最近淋漓出血一个月至今未干净，并伴有下腹痛，准备给予诊断性刮宫。

关于该项特殊检查，以下哪项不正确

A．可以止血

B．可协助诊断不孕的原因

C．可协助诊断出血的原因

D．可以调经和促使妊娠

E．可除外子宫内膜癌