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【单选题】
功率系数Cp与速比的关系是（）A.
速比 越大， Cp 越大
B.
速比 越小， Cp 越小
C.
速过大或过小， Cp都会降低，有一个减速比对应 Cp max
D.
速比与 Cp的关系不确定
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举一反三
【单选题】The author quotes the example of our ancestors to show that education emerged ______ .
A.
when people had enough time
B.
prior to better ways of finding food
C.
when people on longer went hung
D.
as a result of pressure on government
【简答题】The author quotes the example of our ancestors to show that education emerged______ THE RELATIONSHIP BETWEEN FORMAL EDUCATION AND ECONOMIC GROWTH IN POOR COUNTRIES IS WIDELY MISUNDERSTOOD BY ECONOMIST...
【简答题】The author quotes the example of our ancestors to show that education emerged __________. [A] when people had enough time [B] prior to better ways of finding food [C] when people on longer went hung [...
【单选题】The author quotes the example of our ancestors to show that education emerged ______.
A.
when people had enough time
B.
prior to better ways of finding food
C.
when people no longer went hungry
D.
as a result of pressure on government
【单选题】The author quotes the example of our ancestors to show that education emerged
A.
when people had enough time.
B.
prior to better ways of finding food.
C.
when people on longer went hungry.
D.
as a result of pressure on government.
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