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【判断题】
排水通气管在经常有人停留的平屋顶上,通气管出屋面 2m ,并应根据防雷要求设置防雷装置。 ( )A.
正确
B.
错误
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【简答题】一个 5 位数,判断它是不是回文数,即 12321 是个回文数。
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【简答题】判断一个 5 位数是不是回文数。例如 12321 是一个回文数,即它的个位与万位相同,十位与千位相同。
【简答题】S7 -200 系列 PLC 定时器有( ) . ( ) 和 ( ) 三种类型。
【简答题】对于 给定的 一个 5 位数,判断它是不是回文数。即 12321 是回文数,个位与万位相同,十位与千位相同。
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