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【单选题】
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
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【判断题】It is more inexpensive to hire people to do things in most of Asia than USA.
A.
正确
B.
错误
【简答题】Most of the world's soccer balls are made in Asia by very young people who live in poverty.____________,____________
【单选题】Read the paragraph and identify the method the paragraph illustrates. Shanghai is one of the most populated cities in Asia, and New York is one of the most densely populated cities in North America. T...
A.
chronology
B.
process
C.
example
D.
comparison and contrast
【简答题】槽轮机构的主要参数是 和 。
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