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【单选题】
阿司匹林用中性乙醇溶解后用NaOH滴定,用中性乙醇的目的在于( )A.
防止滴定时阿司匹林水解
B.
使溶液的pH等于7
C.
使反应速率加快
D.
防止在滴定时吸收CO2
E.
防止被氧化
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【简答题】请完成课本第131页第四大题翻译题第2小题
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【单选题】听力原文：M: You will have to forgive me if I sound angry. But I am terribly upset. W: Well, what seems to be the trouble? M: This ear! You just sold it to me six months ago. And now it looks as though I'l...
A.
In the manager's office.
B.
It is not indicated.
C.
In an automobile salesroom.
D.
Over the phone.
【多选题】低变气在露点温度进再沸器与脱碳液换热的优点:
A.
避免高温碱液对再沸器的腐蚀
B.
露点下是冷凝放热，给热系数大，传热效果高
C.
让二氧化碳冷凝成液态
D.
使再沸器更易发生爆沸
【简答题】Complete the sentences with the following words. Make changes when necessary. sometimes profession show off He enjoys his new hairstyle and now he is ( ). He is a ( ) baske...
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