试题与答案

燃气胶管的长度一般不得超过()。A、1米 B、1.5米 C、2米 D、2.5米

题型:单项选择题

题目:

燃气胶管的长度一般不得超过()。

A、1米

B、1.5米

C、2米

D、2.5米

答案:

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