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【多选题】
下列哪些加固材料不能重复使用()。A.
镀锌铁线
B.
盘条
C.
钢丝绳
D.
钢丝绳紧固器
拍照语音搜题，微信中搜索"皮皮学"使用
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知识点：
皮皮学刷刷变学霸
举一反三
【简答题】已知tan ='2,' 则 的值为 。
【单选题】When did all these cars invade it? (Para.17)
A.
When did all these cars come into the street?
B.
When did all these cars attack the garden?
C.
When did all these cars come into the garden?
【简答题】已知 ，则 的值为（ ） 0 2 1
【单选题】To deliver a story, you should do all of the following EXCEPT______
A.
capturing the audience's attention fight at the beginning.
B.
making as few gestures as possible.
C.
appealing to the audience' s sense of sight.
D.
monitoring feedback from the audience.
【简答题】已知 ，则sin2θ的值为（ ）．
【单选题】Almost ______ substances expand in volume when heated and contract when cooled.
A.
all
B.
they all
C.
all of
D.
all are
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