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【简答题】
已知 ，且 与 的夹角为 ， ，则 等于 .
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举一反三
【单选题】When _______such a question, he kept silent.
A.
asking
B.
being asked
C.
asked
D.
was asked
【单选题】When ______ if he had any idea of what the novel was about, Jack just kept silent.
A.
asking
B.
asked
C.
to ask
D.
being asked
【单选题】The hotel porter ______ anybody who wasn't wearing a collar and tie.
A.
turned to
B.
turned off
C.
turned away
D.
turned up
【简答题】油常见的伪品有哪些?写出其真伪鉴别方法。
【简答题】个人享受,从事有意义的工作, 以及 满足社会需要也应该进入学生的决策 过程 。
【单选题】He should have come here earlier, but he hasn’t _____yet.
A.
turned in
B.
turned up
C.
turned on
D.
turned out
【单选题】Speaker A: If I were you, I would have accepted the job. Speaker B: ______
A.
I turned down the offer because it would mean frequent business trips away from my family.
B.
Well, maybe I can recommend you to that company if you like.
C.
You should have told me earlier it was a good job offer.
D.
But I don't think I am qualified for that demanding job.
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