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【单选题】
执行下列后,变量 x 和 y 的值分别为()。Dim x%, y% x = 2 y = 3 Do While y <= 5 y = y + 2 Loop
A.
1和5
B.
2和7
C.
2和5
D.
4和7
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参考答案:
举一反三
【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,
【简答题】A.Yes, it is. B.It s perfect. C.I dont like it. D.No, it isnt.
【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
【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
【单选题】A.It s too late. B.It s not yet eight. C.It s already ten o clock. ###SX
A.
It s too late.
B.
It s not yet eight.
C.
It s already ten o clock.
D.
I have no watch.
【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】A.Yes, I live here. B.Yes, it s the railway station. C.No, it s not very far. D.20 minutes walk.
【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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