题目内容

渠道和涵洞连接时,应符合哪些要求?

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心绞痛有哪些类型?

小规模工业企业征收率为6%。

A. 正确
B. 错误

请写出5种以上的特种功能自动电话机?

A vessel not under command making way at night would show().

A. two all-round red lights in a vertical line
B. anchor lights and sidelights
C. two all-round white lights in a vertical line,sidelights and a stern light
D. two all-round red lights in a vertical line,sidelights,and a stern light

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