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【简答题】
数字式万用表的基本结构由哪几部分组成?各部分的作用是什么?
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反馈参考答案：
举一反三
【单选题】在下列关于自感和位移电流的表述中,正确的是:
A.
自感系数的定义式为L=Φm/I，所以I越大，L越小
B.
自感是对线圈而言的，对直导线回路不存在自感问题
C.
位移电流的本质是变化的电场
D.
位移电流是电荷的定向运动产生的，也能激发磁场
【单选题】Why was van den Bercken surprised by the music she found on the Internet?
A.
She didn’t know Handel wrote keyboard music .
B.
It was extremely difficult to play.
【简答题】Why do our students think hard work less important? ______.
【单选题】—This book is a little hard. ________read something easier? —AIl right. [ ]
A.
Why don't
B.
Why not to
C.
Why don't you
D.
Why not you
【简答题】Why are changes in prices hard to measure?
【简答题】Why
was van den Bercken surprised by the music she found on
the Internet? (5.0分)A. She
didn’t know Handel wrote keyboard music . B. It
was extremely difficult to play.
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