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【单选题】
电容端电压和电感电流不能突变的原因是 ( ) 。A.
电场能量和磁场能量的变化率均为有限值
B.
同一元件的端电压和电流不能突变
C.
电容端电压和电感电流都是有限值
D.
电容端电压和电感电流确定
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【简答题】完形填空。 It's a nice day. Li Ming and his friend, Jianjian, go 1 . Li Ming wants to buy a T-shirt, 2 Jianjian wants 3 running shoes (跑鞋). At first (首先), they go to a 4 section. Li Ming 5 a T-shirt, and i...
【单选题】--Nice to meet you, Li Lei. -- ___________
A.
How do you do, Yukio?
B.
See you, Ann.
C.
Nice to meet you, too.
D.
Good afternoon.
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【判断题】The man of the legend, Newton, was the first one who found the reason why apples fall down.
A.
正确
B.
错误
【单选题】A: Li Lei, _____ is my brother. _____ are his books. B: Nice to meet you, Li Lei. [ ]
A.
this, These
B.
That, this
C.
Those, these
D.
Those, that
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