将图中所示二端网络简化为戴维南等效电路，其理想电压源电动势正和内阻 R0分别为()。
A. E=3V，R0=2kΩ
B. E=6V，R0=4kΩ
C. E=-12V，R0=8kΩ
D. E=15V，R0=5kΩ
查看答案
What did the man tell the woman？
A. The shop was closed.
B. The traffic lights were red.
C. The driver was drunk.
便血呈喷射状，色鲜红，肛门瘙痒，舌红，苔薄白，脉浮数。其中医辨证为：E．
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