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【多选题】
在主减速器的调整作业中,下列原则必须遵循的有( )A.
先调整轴承预紧度,在调整啮合印痕,最后调整啮合间隙。
B.
主从动圆锥齿轮轴承的预紧度必须按原厂规定数据和方法调整。
C.
在保持啮合印痕合格的前提下,调整啮合间隙
D.
注意零件原始装配位置、加强零件装配前和装配中的检验。
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皮皮学刷刷变学霸
举一反三
【单选题】气的固摄作用指
A.
推动血液的生成、运行以及精液的生成、输布和排泄
B.
气有保卫机体，防御外邪的作用
C.
阳气能够生热，具有温煦机体脏腑组织器官，以及血、津液等的作用
D.
统摄和控制体内液态物质，防止其无故丢失的作用
E.
气的运动而产生的气、血、津液的相互转化。
【简答题】People_____ (live) comfortably in the towns hardly feel the pleasure of living in the country.
【单选题】Indoor heating systems have made _______ for people to live and work comfortably in a mild climate.
A.
possible
B.
it possible
C.
possible that
D.
it is possible
【单选题】What does the author say about living comfortably in the city?
A.
It incurs a high environmental price．
B.
It brings poverty and insecurity to an end．
C.
It causes a big change in people’s lifestyle．
D.
It narrows the gap between city and country．
【单选题】___ comfortably in his armchair, the old man enjoyed the light music over the radio with his eyes half ___ .
A.
Seating ; closed
B.
Seated ; closed
C.
Sitting ; close
D.
Sat ; closing
【判断题】It's essential to dress comfortably in the office, so you are able to work comfortably.
A.
正确
B.
错误
【单选题】_______ comfortably in a chair, he was completely lost in a magazine.
A.
To sit
B.
Sat
C.
Sitting
D.
Having sat
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