在墙壁上固定一根横放的木条.则至少需要枚钉子． [ ] A． l B． 2 C． 3 D．随便多少枚题目和参考答案——青夏教育精英家教网—

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在墙壁上固定一根横放的木条，则至少需要________枚钉子．
[　　]
A．	l
B．	2
C．	3
D．	随便多少枚

答案：B

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