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【单选题】
PLC内部各继电器的触点,在编程时( )。A.
可以多次重复使用
B.
只能使用一次
C.
最多使用两次
D.
没中继电器规定的次数不同
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皮皮学刷刷变学霸
举一反三
【单选题】What should we notice when we choose the date for the press conference?
A.
Avoid holidays
B.
Avoid local major social activities
C.
Avoid press conferences from other units
D.
Avoid collisions with the press's key propaganda report
E.
All of the above
【简答题】Find out the missing words from the dialogue in the Video Story.Every time we say the date, we are really saying it has been more than 2000 years since the _______of Christ.
【单选题】_____ the absence of the manager, we were unable to decide on the date of the celebration．
A.
In spite of
B.
On behalf of
C.
Due to
D.
Regardless of
【简答题】在车削细长轴时,为了减小工件的变形和振动,故采用较大的车刀进行切削,以减小径向切削分力:
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