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【单选题】
零件尺寸链的封闭环是其中( )。A.
最重要的尺寸
B.
最不重要的尺寸
C.
任选一个尺寸
D.
最难加工的尺寸
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反馈参考答案：
举一反三
【简答题】What does Alyssa like to do when she is angry?
【单选题】The girl asked the teacher _____. [ ]
A.
what does the museum looks like
B.
what the museum looks like
C.
what the museum looked like
【单选题】All flight ____ because of the snowstorm, many passengers could do nothing but stay at the airport.
A.
had been cancelled
B.
were cancelled
C.
having been cancelled
D.
have been cancelled
【单选题】All flights ____because of the snowstorm, many passengers could do nothing but stay at the airport.
A.
had been cancelled 过去完成时
B.
were cancelled
C.
having been cancelled
D.
have been cancelled
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