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问题 单项选择题

平壁导热公式q=λΔt/δ，如温差不变，材料不变，而导热热流密度增大了，此时说明（）。

A.材料的厚度增大了

B.材料的厚度减小了

C.材料的厚度不变

D.不确定

答案

参考答案：B

选择题

选出下列单词的同义词。

1. Does your father watch TV twice a week?                

A. two    

B.  two time    

C.  two times

2. A lot of vegetables will help you to keep in good health.

A. keep health    

B.  stay healthy    

C.  be healthily

3. He returned to China after he finished his study in Oxford University.

A came back    

B.give back    

C.go back

4. It's a lot more fun to go there on foot than by bus.

A.  take bus    

B.  taking a bus    

C.  sit a bus

5. Alice is not the same as Maria.

A.  different from    

B.  different with    

C.  has difference with

6. Mary, you look happy.  What's the matter with you?

A. different    

B.  the same    

C.  wrong

7 .The doctor advised me to eat an apple a day to stay healthy.

A. keep    

B. make    

C. try

8 .When you get back from Thailand, please show me your photos.

A.  give back    

B.  give up    

C.  come back

9 .Can you come over to my house on Friday evening?

A.  turn on    

B.  drop by    

C.  go down

10 .Maybe we can go to the zoo next time.  It's too cold today.

A.  Perhaps    

B.  However    

C.  Certainly
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单项选择题 B型题

血管损伤的主要临床表现（）

A.腹痛、恶心、呕吐

B.腹痛，放射痛

C.失血性休克

D.腹膜刺激征

E.腹痛、呕血、放射痛
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