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【单选题】
这个图标代表什么A.
点测光
B.
局部测光
C.
评价测光
D.
中央重点测光
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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
参考解析：
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