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【单选题】
( )不是超声波探伤的缺点。A.
判断缺陷性质直观性差
B.
对缺陷尺寸判断不够准确
C.
近表面缺陷不易发现
D.
要求探伤零件表面粗糙度值较大
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举一反三
【单选题】The only trouble with young drivers is that
A.
they tend to own sports ear.
B.
they are too proud of their ears.
C.
they soon become like the older ones.
D.
they think they are on the battlefield.
【简答题】Don't pretend to know. You don't know it. Don't pretend not to know. You really know it.
【单选题】—Remember not to pretend to know what you don’t know. — _____. My last lesson is still fresh.
A.
No, I will
B.
No, I won’t
C.
Yes, I won’t
D.
Yes, I will
【单选题】Don’t pretend _____.Look!You are holding your English book upside down.
A.
to read
B.
to have read
C.
to be reading
D.
reading
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