检查跳板收放是否可靠,有效,能否收起到30的角度。
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6135K-5型柴油发动机标定的功率117.7kW,这是()功率。
A. 15min
B. 1h
C. 20min
D. 12h
Fair and(1)competition in government procurement around the world is good business and good public policy. Competitive pricing, product (2)and performance improvements result from competitive practices and help ensure that government authorities get the best (3)for the public they serve.
A. help
B. server
C. value
D. policy
用绝缘电阻表测量电器部件及设备电阻值应在2M以上。
A. 正确
B. 错误