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【单选题】
下列不属于汽车电气设备基本特点的是A.
两个电源
B.
低压直流
C.
负极搭铁
D.
单线串联
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反馈参考答案：
举一反三
【简答题】已知25℃时，K a (HAc)=1.75×10 -5 。计算该温度下0.10mol·L -1 HAc溶液中H + 浓度及溶液的pH，并计算该浓度下HAc的解离度。
【简答题】具有约束纵行诸经作用的经脉是______。
【单选题】If Mr.Dewey____ present, he woud have offered any possible assistance to the people there.
A.
were
B.
had been
C.
should be
D.
was
【单选题】If Mr. Dewey _____ present, he would have offered any possible assistance to the people there.
A.
were
B.
had been
C.
should be
D.
was
【单选题】If Mr. Dewey ___________ present, he would have offered any possible assistance to people there.
A.
were
B.
had been
C.
should be
D.
was
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