问题
选择题
the end of the match, we had kicked four goals. [ ]
A. At
B. By
C. In
D. On
答案
答案：B
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the end of the match, we had kicked four goals. [ ]
A. At
B. By
C. In
D. On
答案：B
、－COOH两两组成的物质中，能与NaOH反应的物质有