Before any work on electrical or electronic equipment is performed, which of the following
A. De-energize the applicable switchboard bus
Bypass the interlocks
C. Secure and tag the supply circuit breaker in the open position
D. Station a man at the circuit supply switch
查看答案
电影《》中的片段“敖德萨阶梯”就是通过蒙太奇剪辑创造时空的典型案例。
非平衡构图能够还原人眼正常的视觉习惯，是常规的影视构图，因此能给观看者带来相对轻松舒适的观影体验。()
参考答案：错误
计算收缩期左室射血分数的公式是
A. EF％=CO／ESV×100％
B. EF％=C0／EDV×100％
C. EF％=SV／EDV×100％
D. EF％=SV／ESVx100％
EF％=CI／EDV×100％
The stability of a vessel is normally the greatest when all fuel and water tanks are full
A. center of gravity is lowered
B. center of buoyancy is lowered
C. reserve buoyancy is unchanged
D. hull freeboard is increased
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