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【判断题】
G92 X(U)～Z(W) ～F～R 指令中XZ为螺纹终点坐标A.
正确
B.
错误
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举一反三
【单选题】What can we infer from the passage?
A.
The state should provide protection for all the old people.
B.
The state has to create a suitable framework to restrict the private pensions.
C.
The state should protect those who can't support themselves.
D.
The state will play a secondary role in pensions due to more private pensions.
【单选题】The deposits should be scraped away
A.
The sediments are to be scraped away
B.
The dust is to be washed away
C.
The defects are to be set right
D.
The nuts of the bolts are to be tightened
【单选题】Before we move, we should ________ some of the old furniture, so that we can have more room in the new house.
A.
cancel
B.
conceal
C.
discard
D.
dissipate
【简答题】检查发电机转子滑环时,滑环的光洁度要 ,滑环的绝缘性应 。
【单选题】We scraped the old paint from the furniture.
A.
rubbed
B.
resumed
C.
rejected
D.
released
【多选题】下列关于施工现场临时用电要求中，正确的有（ ）。
A.
采用TN—S接地、接零保护系统
B.
采用三级配电系统
C.
采用两级漏电保护和两道防线
D.
采用同一个开关电器直接控制多个用电设备
E.
必须按照“开关箱一分配电箱一总配电箱”顺序送电
【简答题】完形填空。 At our school,we sometimes have a special day to help others.Last year we went to an old people's 1 and sang songs and performed a play for 2 .The old people were very 3 .We should be allowed to...
【简答题】图案填充命令可以使用对话框操作来填充图形中的一个( )
【多选题】下列关于施工现场临时用电要求中，正确的有（ ）。
A.
采用TN-S接地、接零保护系统
B.
采用三级配电系统
C.
采用两级漏电保护和两道防线
D.
采用同一个开关电器直接控制多个用电设备
E.
必须按照'开关箱。分配电箱。总配电箱'顺序送电
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