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【多选题】
图6所示正弦稳态电路中，【图片】,电流表PA的示数为零，求：（1）电流的角频率ω；（2）电流i(t)与电流【图片】（t）：（3）电源发出的有功功率P和无功功率Q。【图片】A.
w= 100rad/s
B.
i(t)= sin(100t-53.1°)A
C.
ic(t)= sin(100t-53.1°)A
D.
P=60W, Q=80var
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【简答题】写出时间。 seven fifty in the morning twelve o'clock nine ten in the evening three forty-five in the afternoon eight thirty in the evening eleven twenty in the morning 7: 50 a. m. 1_________________ 2_____...
【单选题】社区保健门诊护士为一健康婴儿体检，小儿体重7．5kg，身长65cm，头围44cm，可独坐，能辨认熟人和陌生人，护士判断其可能的月龄是
A.
3个月
B.
4个月
C.
6个月
D.
9个月
E.
10个月
【单选题】Which magnetic compass corrector（s）CANNOT be set on a heading of magnetic east or magnetic west ________．
A.
Heeling magnet
B.
Flinders bar
C.
Fore-and-aft magnets
D.
All of the above can be set on magnetic east or magnetic west headings
【单选题】The magnetic compass magnets are acted on by the horizontal component of the earth’s total magnetic force. This magnetic force is GREATEST at the _____.
A.
magnetic pole
B.
south magnetic pole
C.
magnetic prime vertical meridian
D.
magnetic equator
【单选题】The magnetic compass magnets are acted on by the horizontal component of the Earth’s total magnetic force. This magnetic force is GREATEST at the _________.
A.
north magnetic pole
B.
south magnetic pole
C.
magnetic prime vertical meridian
D.
magnetic equator
【单选题】When did the conversation take place?
A.
About five o'clock.
B.
About nine o'clock.
C.
About ten o'clock.
D.
About eleven o'clock.
【简答题】A．Almost ten feet tall. B．Ten feet tall. C．Eight to nine feet tall. D．Five to six feet tall.
【单选题】Almost five in ten of the prisoners in the USA are nonviolent offenders who are in need of help with their ( ).
A.
choir
B.
addiction
C.
indifference
D.
persecution
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