【判断题】【消耗次数：1】
滚珠丝杆不能自锁。
①
正确
②
错误
参考答案：
复制
纠错
相关题目
【判断题】
滚珠丝杆副的工作原理是：在丝杆和螺母的螺纹滚道中装入一定数量的滚珠，当丝杆与螺母相对转动时，滚珠可沿螺纹滚道滚动，并沿滚珠循环装置的通道返回，构成封闭循环，使滚珠循环地参加螺旋传动，保持丝杆与螺母之间的滚动摩擦。
①
正确
②
错误
【简答题】
螺纹联接的自锁条件是什么？
随机题目
【单选题】
To make this _____clear we shall have to look closely into biology’s long history.
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distinction
②
indication
③
recognition
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constitution
【单选题】
Our civilization cannot be thought of as _____in a short period of time.
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to have been created
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to be created
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having been created
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being created
【单选题】
While being questioned on the court, the man denied _____the old lady’s necklace.
①
having taken
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taking
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to have taken
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to take
【单选题】
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①
means to
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directs toward
③
is meant to
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leads to
【单选题】
Even as _____, he made several wonderful inventions.
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a stock
②
a representative
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undergraduate
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