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问题
填空题
各式起重机的齿轮、()、()等露出的转动部分,均应设防护装置。
答案
参考答案:转轴;对轮
填空题
△ABC
∽
△A´B´C´,△ABC 的三边长为1,1,
2
,△A´B´C´的其中一边长为2,则它的另两边长为______.
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选择题
One thousand people were trapped in the damaged building, ______ were saved.
A.most of them B.most of that C.the most D.most of whom
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