题目内容

“竹刑”的作者是()。
A子产
B墨翟
C邓析
D庄子

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JZ-7型空气制动NPT5型空气压缩机工作时，机油油压应为()。

A. 300～500kpA
B. 150～250kpA
C. 250～350kpA
D. 300～400kpA

用数字式万用表测量直流电流时，量程开关拨至()范围内的合适挡。

A. “DVC”
B. “DCA”
C. “ACA”
D. “ACV”

What is the minimum operation time of reserve source of energy on ships without an emergency energy source？

A. 1 hour
B. 6 hours
C. 12 hours
D. 24 hours

What is the minimum operation time of reserve source of energy on ships with an emergency

A. 1 hour
B. 6 hours
C. 12 hours
D. 24 hours