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【单选题】
当电流源开路时，该电流源内部()A.
有电流，有功率损耗
B.
有电流，无功率损耗
C.
无电流，无功率损耗
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举一反三
【简答题】请翻译下面这段语句 In some operations the molds are placed on a pouring floor,whereas other operations are automatic or semiautomatic,the molds being carried along a conveyor( 传送带 ) to the ladles where a measu...
【单选题】In Philippines, the importance of the host and the occasion are measured by the amount of _____served.
A.
lechon
B.
dog meat
C.
beer
D.
chicken
【简答题】治疗心室纤颤选用的药物是（ ）。
【单选题】Galileo measured the amount of time that took an object to fall straight down.
A.
True
B.
False
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