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【单选题】
“ 받다 ”的中文意义是A.
跑，跳
B.
采，摘
C.
走，走路
D.
接收，收到
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【单选题】Tom Williams arrives at Beijing Capital International Airport. He calls his friend,( 1 )
A.
Dr. Nan
B.
Dr. An
C.
Dr. Wan
【单选题】Tom Williams arrives at Changdong Airport. He calls his friend_________
A.
Dr. Nan
B.
Dr. An
C.
Dr. Wan
【单选题】Tom Williams arrives at Beijing Capital International Airport. He calls his friend, ( ).
A.
Dr. An
B.
Dr. Nan
C.
Dr. Wan
【简答题】我国工农业生产和生活照明用电电压是____V,其最大值____V;周期T= ____s,频率f= ____Hz,角频率ω=____rad/s
【单选题】Tom Williams arrives at Beijing Capital International Airport. He calls his friend___________.
A.
Dr. Nan
B.
Dr. An
C.
Dr. Wan
【单选题】Tom Williams arrives at Changdong Airport. He calls his friend, 1 Dr. Nan, Dr. An, Dr. Wan . His friend is surprised by his 2 late, early, punctual arrival. She is going to pick him up at the 3 airpo...
A.
late
B.
early
C.
punctual
【单选题】Tom Williams arrives at Changdong Airport. He calls his friend, 1 Dr. Nan, Dr. An, Dr. Wan . His friend is surprised by his 2 late, early, punctual arrival. She is going to pick him up at the 3 airpo...
A.
airport
B.
hotel
C.
office
【单选题】Tom Williams arrives at Changdong Airport. He calls his friend, 1 Dr. Nan, Dr. An, Dr. Wan . His friend is surprised by his 2 late, early, punctual arrival. She is going to pick him up at the 3 airpo...
A.
five-minute, ten-minute, fif-minute
B.
ten-minute
C.
fif-minute
【简答题】并联于无限大电网运行的隐极同步发电机，原来发出一定的有功功率和电感性无功功率，若保持有功输出不变，仅调节励磁电流I f 使之减小，问 和 各按什么轨迹变化?功角θ如何变化?要保持稳定运行，I f 能否无限减小(忽略电枢电阻)?
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