一氧化碳气体只有在( )的情况下才可能对钢制容器产生应力腐蚀_爱下问搜题

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问题单项选择题

一氧化碳气体只有在( )的情况下才可能对钢制容器产生应力腐蚀。

A．温度超过20℃
B．温度低于20℃
C．含有杂质
D．含有水分

答案

参考答案：D

完形填空

完形填空。

     Lily: Hello!
     Lucy:   1 !
     Lily: What's your favourite colour?
     Lucy:   2 favourite colour is yellow.
     Lily:   3   you like the pink 4   purple skirt?
     Lucy: Yes, it's very 5 .
     Lily: What do you eat   6 breakfast?
     Lucy: I eat eggs,   7   I don't like cakes.
     Lily: What do you like to 8   after school?
     Lucy:  I like   9   play 10 the computer.

( )1. A. Hello
( )2. A. I
( )3. A. Does
( )4. A. or
( )5. A. nice
( )6. A. in
( )7. A. and
( )8. A. do
( )9. A. in
( )10.A. in

B. Sorry
B. His
B. Do
B. and
B. big
B. to
B. but
B. doing
B. on
B. for

C. Thanks
C. My
C. Did
C. to
C. short
C. for
C. or
C. did
C. to
C. on

名词解释

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