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【多选题】
根据酸碱质子理论，判断在水溶液中下列物质哪些仅是酸？A.
[Al(H 2 O) 5 (OH)] 2+
B.
CO 3 2-
C.
H 3 PO 4
D.
[Al(H 2 O) 6 ] 3+
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反馈参考答案：
举一反三
【简答题】第三块IDE硬盘的第二个分区的访问路径是( )
【单选题】—______ does Tim go to a movie? —Twice a month. [ ]
A.
How long
B.
How soon
C.
How often
【单选题】What does the man mean?
A.
The door is unlocked.
B.
He is not the one to blame.
C.
Somebody has just left the lab.
【简答题】What does the author mean by saying "risk is not the same as er"?
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