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【单选题】
向心滑动轴承的主要结构形式有三种，其中（）滑动轴承应用最广A.
整体式
B.
对开式
C.
调心式
D.
其他
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举一反三
【单选题】-Nice to meet you. -_____
A.
Fine, thank you.
B.
How are you?
C.
Nice to meet you, too.
D.
Thank you.
【单选题】Section D 听力原文： Listen to a talk given by an astronaut. Thank you. It's great to see so many of you interested in this series on 'Survival in Outer Space'. Please excuse the cameras--we're being video...
A.
To show a videotape on survival in outer space.
B.
To gain support for the space program.
C.
To describe her experience on space missions.
D.
To inform. the audience about the space suit.
【单选题】How are you?----______________
A.
How are you ?
B.
Thank you
C.
Fine, thank you.
D.
Good.
【单选题】Section A (1)
A.
It' s open at 9 a. m.
B.
Sorry, I have no idea.
C.
That's all right.
D.
Thank you
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