【单选题】With No.1 and No.2 alternators running in parallel and the KW loads equally shared, one alternator is drawing much higher current than the other. What does this indicate?
A.
The alternators are not generating the same voltage and should be adjusted on automatic voltage regulator rheostats.
B.
Alternators frequencies are different and should be adjusted on the governor speed controllers.
C.
Alternators are out of phase and should be tripped and paralleled again.
D.
One alternator has lost one of its phase.
【判断题】只有直接耦合的放大电路中三极管的参数才随温度而变化,电容耦合的放大电路中三极管的参数不随温度而变化,因此只有直接耦合放大电路存在零点漂移。
【多选题】打好脱贫攻坚战,关键在人,在人的观念、能力、干劲。对基层干部,重点是提高实际能力,培育( )的扶贫干部队伍。
【简答题】单项选择 1. Julie’s father ________ to London last month. He ________ there three times. A. went; had gone B. has gone; has been C. went; has been D. has been; had gone 2. — Dave, we will leave in 10 m...
【判断题】图纸中标比例为2:1,角度也要放大2倍。
【简答题】I. Listen to a conversation 1 and choose the best answer to each of the following questions. 1. Why is Lucy eating less than before? A. She is ill. B. She wants to lose weight. C. She has no appetite ...
【单选题】The sentence "... , and no one has any idea where it will go as it meanders or leaps and sparkles or just glows" in Para. 2 employs the rhetorical device of _____.
【简答题】关于因果关系,下列哪一选项是错误的?( )。