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【单选题】
蓄电池提高极板活性物质表面积的方法有( )。A.
减少极板片数
B.
提高活性物质的多孔率
C.
加稀硫酸
D.
加蒸馏水
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反馈参考答案：
举一反三
【单选题】Who is the writer of “Sons and Lovers”?
A.
D. H. Lawrence
B.
Henry James
C.
George Owell
【判断题】The writer ’ s sons came to the pine tree often after their grandmother died because their grandmother used to take them there.
A.
正确
B.
错误
【单选题】What's the name of Gongzi's sons?
A.
Gongsun
B.
Gongzhu
C.
using gongzi's zi as their shi
D.
Sima Shi
【单选题】Yvonne Webster's sons occasionally took drug in school, so she searched the boy's rooms and went through their pockets.
A.
Y
B.
N
C.
NG
【简答题】（7分）溶液是生活中常用的混合物。 （1）硫酸铜溶液可用于游泳池消毒，硫酸铜溶液中的溶质是 。 （2）市售的过氧乙酸（CH 3 COOOH）溶液中溶质的质量分数大多为40%，稳定性差，室温下就可分解成乙酸（CH 3 COOH），并释放出氧气，该反应的化学方程式为 。将40% 的过氧乙酸溶液稀释成2%，可用于空气消毒， 稀释过程中浓溶液与所加水的质量比为 。 （3）甲、乙两种固体物质的溶解度曲线如图...
【判断题】The writer’s sons came to the pine tree often after their grandmother used to take them there.
A.
正确
B.
错误
【单选题】In the writer's opinion, laws and manners ______.
A.
are always the same
B.
are changeable
C.
can be important if you dine in a restaurant
D.
influence each other
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