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【单选题】
提出"范例教学"理论的教育家是( )。
A.
根舍因
B.
C.
巴班斯基
D.
赞科夫
拍照语音搜题,微信中搜索"皮皮学"使用
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【单选题】已知有源二端网络的开路电压为 10V ,短路电流 5A ,则把一个 电阻接到该网络, R 上的电压为( )。
A.
8V
B.
6V
C.
5V
D.
4V
【简答题】A.It s Friday. B.It matches me well. C.I bought it in thedepartment store. D.Sorry, I dont know,
【单选题】已知有源二端网络的开路电压为 10V ,短路电流 5A ,把一个2欧 电阻接到该网络, 则该电阻 上的电压为( )。
A.
8V
B.
6V
C.
5V
D.
4V
【简答题】A.There is no more left. B.It doesn t appeal to her. C.It s incredibly delicious. D.She has already tasted it.
【单选题】It s getting rather late. It s time we______ home.
A.
are going
B.
went
C.
go
D.
must go
【单选题】It s common knowledge that today s workplace is more volatile(易变的)than it once was. One has to know how to make the necessary changes to compete in this new, high-tech world. The Career Coach offers e...
A.
people who are quitting a job
B.
people who seek expert career advice
C.
people who face a raise or promotion
D.
people who are successful in their careers
【简答题】一个有源二端网络的开路电压为4V,短路电流为2A,则等效电压源为; = V, = Ω 。
【简答题】It s just a small, white envelope stuck among the branches of our Christmas tree.It has been there for the past 10 years or so.It all began because my husband Mike hated Christmas—the commercial aspec...
【单选题】一个有源二端网络,已测出其开路电压为12V,短路电流为2A。若接入2Ω电阻负载,它输送给负载的电流为( )
A.
2A
B.
4A
C.
6A
D.
1.5A
【简答题】一个有源二端网络,它的开路电压为 50V ,短路电流为 4A ,当外接 7.5 Ω 的负载时,求负载的电流 A
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