【判断题】【消耗次数：1】
传动链是指构成某个传动联系的主运动。（）
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正确
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错误
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相关题目
【单选题】
根据传动联系的性质，传动链可以区分为（ ）
①
内联系传动链、操纵和控制传动链
②
操纵和控制传动链、行程传动链
③
外联系传动链、内联系传动链
④
行程传动链、内联系传动链
【单选题】
多级齿轮传动中，各级传动比相等的分配原则适用于按（?? ）设计的传动链。
①
输出轴的转角误差最小原则
②
重量最轻原则（大功率装置）
③
重量最轻原则（小功率装置）
④
最小等效转动惯量原则
【判断题】
现代数控机床的主运动广泛采用无级变速传动，用交流调速电动机或直流调速电动机驱动，它们能方便地实现无级变速，且传动链短，传动件少，提高了变速的可靠性。该说法（ ）
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正确
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错误
随机题目
【单选题】
Wealthy ____ he was, the governor would not spend a penny on such things.
①
as
②
if
③
though
④
however
【单选题】
—Guest: Oh, it’s ten o’clock. I’d better go now.—Host: ____.
①
OK. Please walk slowly and take care.
②
Why do you want to go now? Don’t you want to stay?
③
Yeah, it’s really late. Why not immediately?
④
Won’t you stay for another cup of coffee?
【单选题】
Youhavetopaytohavethebooksprinted, ____ canbequiteexpensive.
①
which
②
it C. that D. this
③
that
④
this
【单选题】
Early to bed and early to rise ____ a man healthy, wealthy and wise. ?
①
make ?
②
had made ?
③
makes ?
④
will make?
【单选题】
People often ____ the old days ____good times, and seem to forget the hardship they suffered.
①
hold--back
②
associate--with
③
put--down
④
turn--out
【单选题】
Before taking off, they were asked to ____ their seat-belts.
①
fast
②
wide
③
focus
④
fasten
【单选题】
In HangzhouMr. Green was so struck by____ beauty of ____ nature that he stayed for another night. ?
①
/; / ?
②
/; the ?
③
the; / ?
④
the; the?
【判断题】
<img src=http://huaweicloudobs.ahjxjy.cn/db7e488fc9e00874c3c04fefca18a12c.png/>
①
正确
②
错误