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【简答题】
1 mol 葡萄糖经糖酵解可生成___ mol ATP ,净生成_____ mol ATP
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【单选题】在纯电阻正弦交流电路中,端电压 V,电阻为10 Ω,若端电压u和总电流i参考方向一致,则有关电流的瞬时值i、有效值相量、有效值I的下列结论,正确的是______
A.
A
B.
A
C.
A
D.
i=22∠0°A
【单选题】You were ________ to close the windows. Why were you so careless? [ ]
A.
allowed
B.
believe
C.
supposed
D.
caused
【简答题】在纯电阻正弦交流电路中,已知端电压 V。 电阻 Ω, 那么电流 _________________, 电压与电流的相位差为________________, 电阻上消耗的功率为 _____________ 。
【单选题】在纯电阻正弦交流电路中,端电压u=220 sin ω t V,电阻为10Ω,若端电压u和总电流i参考方向一致,则有关电流的瞬时值i、有效值相量 、有效值 I 的下列结论,正确的是 。
A.
=22A
B.
I =220 sin ω t A
C.
i=22 sinωt A
D.
i=22∠0° A
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