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【判断题】
《平均律钢琴曲集》是巴洛克时期作曲家亨德尔的作品
A.
正确
B.
错误
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参考答案:
举一反三
【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】并联于无限大电网运行的同步发电机,仅调节励磁,改变的是同步发电机的()。
A.
无功功率
B.
有功功率
C.
视在功率
D.
功率因数
【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】一个育龄妇女婚前检查,风疹IgG抗体阴性。婚后育龄妇女准备要小孩,但当地每年都有风疹散在流行。为防止先天性风疹综合征发生的最好办法是()。
A.
该育龄妇女不接触出疹的病人
B.
注射风疹减毒活疫苗,并在3~6个月后再怀孕
C.
推迟1年怀孕
D.
保持家中空气流通和空气消毒
E.
注射丙种球蛋白和胎盘球蛋白
【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, fifteen-minute
B.
ten-minute
C.
fifteen-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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