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【单选题】
用基准物质Na2CO3标定HCl溶液时,HCl 与 Na2CO3反应的计量比为:A.
1
B.
2/1
C.
1/2
D.
1/5
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举一反三
【简答题】听材料，回答问题。 1. Mr. Brown worked in an office ______. A. in a small town B. in a small house C. far from the station D. in London 2. John went to London to ______. A. see Mr. Brown B. work C. ask the way...
【单选题】—________ the small town is! — Yes, it is more beautiful than ________ town that I visited last year.
A.
How beautiful; the
B.
How beautifully; the
C.
How beautifully; a
D.
How beautiful; a
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