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问题 判断题

白棕绳受力较大时不得打扣。

答案

参考答案：对

判断题

相对性状是指两种性状的不同表现形式。[ ]
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选择题
—A shy boy like John ________ give up a secure job and start his own business!
—Yes，nobody had expected that.
A．wouldB．shouldC．mightD．could
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