下列计算正确的是（ ） A．a3•a2=a6 B．b4•b4=2b4 C．x5+

试简述压控测试工艺的井场准备要求。

项目的总结评价是项目业主在竣工验收的基础上对项目的（）、社会等效益和效果的系统总结与分析。

A．技术

B．质量

C．成本

D．经济

E．环境

阅读理解。

     A car needs gas to run and your body also needs food to work for you. Eating the right kind of

food is very important. It can keep your body strong, so take care of what you eat.

     There are four main food groups altogether. The dairy products group has food like milk, cheese

and sour milk. The other three groups are the meat and fish group, the fruit and vegetable group, a

nd the bread and rice group. Each meal should have at least one food from all the four main groups.

With all these food together you will be given enough energy during the day.

     It is easy to get into bad eating habits. You may eat your breakfast in a hurry to get to school

on time. Or you may not have time for a good lunch. It may seem easy to finish your supper with

fish and chips all the time. But you will find yourself tired during these days and you can not think

quickly.

    Watching what you eat will help keep your body healthy and strong. It is also good to take some

exercise. It will help you eat more if you take a walk or play games in the open air. Having a good

eating habit with some exercise is the key to your health.

1.How many main food groups are mentioned in the passage?

A. 2    

B. 3        

C. 4    

D  5

2. Which of the following diets do you think is the best one?

A. Eggs, tomatoes and chicken.

B. Milk, bread, cabbages and beef.

C. Corn, fish, cream and pork.  

D. Rice, beancurd, apples, fish and chicken.

3. Which of the following is a good eating habit?

A.Going to school without any breakfast.

B. Eating fish and chips for supper all the time.

C. Finishing your lunch in a very short time.

D. Having at least one food from all the four groups each meal.

4. In this passage the writer mainly tells us that ______.

A.every person needs food to grow well

B. taking exercise can keep your body strong

A.right kind of food with exercise will keep you healthy

B.enough energy helps people think more quickly

5. According to the passage, which is NOT TRUE?

A.Each meal should have at least one food from each main group.

B.It will help you eat more if you take a walk or play games in the open air.

C.Having a good eating habit with some exercise is very important for your health.

D.It is good to finish your breakfast in a very short time

工人在烈日下工作，突然晕倒，不正确的处理方法是（）。

A.让晕倒的工人呼吸到充足的氧气

B.其他人围住病人，以免让风吹着病人

C.将晕倒的工人抬到现场最阴凉且空气清新处，由比较镇定且有经验的工人照顾直到救护车到达

D.其他人不应围住病人，以保持空气清新和流通

属于事故类的信息是（）。

A、保护跳闸出口

B、保护重合闸出口

C、开关机构三相不一致跳闸出口

D、开关储能电机故障