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— Is this book yours?—No, it’s not ______. It’s Betty’s.
1年前
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_____ (be) the green shorts yours?
1年前
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For many years, no one could communicate with people who had been born without hearing.
1年前
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是否存在正整数m，使得f（n）=（2n+7）•3n+9对任意自然数n都能被m整除？若存在，求出最大的m值，并证明你的结论；若不存在，请说明理由．
1年前
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Mitts and mittens are not different. They are ___________. [ ]
1年前