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【单选题】
带传动中，是指传动带由 送出，而向 缠绕的一边。A.
主动轮/从动轮
B.
张紧轮/从动轮
C.
张紧轮/主动轮
D.
从动轮/主动轮
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举一反三
【简答题】Passage Three:Questions 31 to 35 are based on the following passage.“... We are not about to enter the Information Age but instead are rather well into it.” Present predictions are that by 1990, about...
【简答题】[A] activity [B] action [C] act [D] acting
【单选题】We are offering you firm________ on the same terms and conditions as the previous contract.
A.
as following
B.
as follow
C.
as is following
D.
as follows
【单选题】A I have two friends． They are Tom and Jim． We go to school at seven o'clock． We go home at five in the afternoon． We go to bed at about nine thirty． I have a clock． I put it on the desk． Tom has an o...
A.
an old watch
B.
two friends
C.
a clock
D.
Both B and C
【单选题】We ___________ on it for many hours, but we have not yet reached any conclusion. A. are being worked B. are working C. have been working D. have been worked
A.
are being worked
B.
are working
C.
have been working
D.
have been worked
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