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【简答题】
在图所示电路中，调节C使电路中电流达到最大I max =0.5A，U L =200V。已知：u S =2 cos(10 4 t+20°)V。
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【单选题】Most respondents of the Wall Street Journal poll______.
A.
are pessimistic about America's general track
B.
are optimistic about the country's outlook
C.
appreciate America's economic recovery
D.
feel that they couldn't afford a house
【单选题】The Midwest is America's most important______ area.
A.
agricultural
B.
industrial
C.
manufacturing
D.
mining industry
【简答题】A．As one of the greatest American scholars. B．As one of America's most ingenious inventors. C．As one of the founding fathers of the United States. D．As one of the most famous activists for human right...
【单选题】In the program title' America' s Most Wanted' ( line 1, para 3 ), 'most wanted' probably refers to______.
A.
criminals
B.
producers
C.
police
D.
actors
【单选题】California, by some measures America's most【C1】______ state, is at the same time its most agricultural state【C2】______ total farm income. In 1988, the market value of【C3】______ products sold in Califo...
A.
civic
B.
municipal
C.
urban
D.
urbanized
【单选题】It is acknowledged that the modem musical show is America's most original and dynamic contribution toward theater. In the last quarter of 20th century, America has produced large 【21】______ of musical...
A.
number
B.
amount
C.
quantity
D.
numbers
【单选题】Christmas was a very ordinary day for most people in America' s southern colonies.
A.
Y
B.
N
C.
NG
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