修筑公路时通常用于公路接缝，密封性能较好的密封材料是（）。 _爱下问搜题

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问题单项选择题

修筑公路时通常用于公路接缝，密封性能较好的密封材料是（）。

A．沥青嵌缝油膏

B．丙烯酸类密封膏

C．聚氨酯密封膏

D．聚氯乙烯接缝膏

答案

参考答案：C

填空题

选词填空。

plant at in on flowers April May warm hot Because season

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