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【单选题】
在轮机中应用最广泛，且效率较高，传动比准确的传动是（）。A.
蜗杆传动
B.
带传动
C.
齿轮传动
D.
链传动
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反馈参考答案：
举一反三
【单选题】William found it increasingly difficult to read, for his eyesight was beginning to _____. [ ]
A.
disappear
B.
fall
C.
fail
D.
damage
【简答题】Clerk(C):Good morning. Guest Service Center. Can I help you? Guest(G): I certainly hope so. I am very(1) . C: What seems to be the problem, madam? G: The air-conditioner in my room isn't working and t...
【简答题】固体胶棒,80克装
【单选题】According to the American Red Cross, blood donors are __________ needed after natural disasters or other catastrophes.
A.
bizarrely
B.
urgently
C.
fantastically
D.
verbally
【单选题】According to the passage, what leads to the lack of qualified workers in the US?
A.
The disadvantages of the agrarian-age education system.
B.
The shortage of work opportunities due to the declining economy.
C.
The cooling of American economy.
D.
Both the education system and the workforce classification.
【单选题】听力原文：W: There must be a thunderstorm in some place, because the picture isn't very sharp and the sound isn't clear? M: I think you are right. They said on the radio last night that a storm was coming ...
A.
Looking at the photos.
B.
Listening to the radio.
C.
Watching television.
D.
Reading a newspaper.
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