按不同工作的需要,调整各传动链中的可调节(),即为机床运动的调节。
A. 传动系统
B. 传动比
C. 传动轴
D. 传动元件
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出口货物的完税价,以下公式表述正确的是()。
A. 完税价=离岸价/(1-出口关税率)
B. 完税价=离岸价/(1-出口货物消费税率)
C. 完税价=离岸价/(1-出口货物增值税率)
D. 完税价=离岸价/(1+出口关税率)
Which two statements are true regarding transactions in an Oracle database()
A. Multiple transactions can use the same undo segment.
B. A transaction is assigned an undo segment when it is started.
C. More than one transaction cannot share the same extent in the undo tablespace.
D. The transactions use system undo segment to store undo data if all the segments in the undo tablespaceare used.