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【单选题】
铁素体的力学性能特点是( )A.
强度高，硬度低，塑性好
B.
强度低，硬度低，塑性差
C.
强度低，硬度低，塑性好
D.
强度低，硬度高，塑性差
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【单选题】听力原文：M: I stay up all night studying for the test. W: Again? How you get by with so little rest is mystery to me. Q: What does the woman mean? (14)
A.
She often stays up reading late.
B.
The man should spend more time studying.
C.
She wonders how the man manages that with so little rest.
D.
She has no idea what kind of the test she is going to take.
【简答题】I stay up all night ______ to find a new solution to the problem. A) trying B) have tried C) try D) tried
【单选题】I ’ ll stay up all night, if necessary, to get it ________.
A.
finish
B.
to finish
C.
finished
D.
finishing
【单选题】听力原文：W：David，I think Friday is bad for a party；we are too tired to stay up all night. Saturday would be better. M：All right. Then we put it off to Saturday. Q：When do they decide to have the party? (5...
A.
Friday.
B.
Saturday.
C.
Sunday.
D.
Wednesday.
【单选题】I stay up all night _________to find a new solution to the problem.
A.
trying
B.
have tried
C.
try
D.
tried
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