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【简答题】
在图5-14所示电路中,若电流i(t)=1sin314tA,试求电压u R (t)、u L (t)、u C (t)和u(t),并绘出波形图和相量图。
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韧性饼干
B.
苏打饼干
C.
华夫饼干
D.
威化饼干
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正确
B.
错误
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A.
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B.
A weather reporter.
C.
A policeman
D.
A doctor.
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【多选题】影响肺泡回缩力的因素有()
A.
胸内负压
B.
肺泡表面活性物质
C.
肺泡内层液泡的表面张力
D.
肺的弹力纤维
E.
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A.
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B.
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C.
playing football
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A.
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B.
一个季度
C.
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D.
一年
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A.
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错误
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