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【单选题】
Cu和Cu-Zn合金焊合后发生达尔效应,测得界面向Cu-Zn方向移动,则( )。A.
Cu的扩散速率大于Zn
B.
Zn的扩散速率大于Cu
C.
Cu的扩散速率等于Zn
D.
和扩散速率大小无关
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反馈参考答案：
举一反三
【单选题】_______ your pen and write down what I’m going to say. [ ]
A.
Take away
B.
Take off
C.
Take from
D.
Take out
【单选题】I’m sorry to____ your time.--It doesn’t matter.
A.
take off
B.
take up
C.
take down
D.
take out
【单选题】—Would you mind ______ my pet dog while I’m away? —Certainly not.
A.
take care
B.
take care of
C.
to take care of
D.
taking care of
【单选题】postpone
A.
try very hard to persuade
B.
delay
C.
lift( the shoulders) slightly
D.
happen, occur, esp. unexpectedly
相关题目：
【单选题】I’m sorry to____ your time.--It doesn’t matter.
A.
take off
B.
take up
C.
take down
D.
take out
参考解析：
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