屋面防水等级为Ⅲ级，设防道数为一道设防，选用自粘聚酯胎改性沥_爱下问搜题

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问题判断题

屋面防水等级为Ⅲ级，设防道数为一道设防，选用自粘聚酯胎改性沥青防水卷材时，其厚度应为≥3mm。( )

答案

参考答案：错

选择题

---Why isn't he in the hospital with his injured mother?

---No one ______ him of the accident.

A．informed

B．informs

C．had informed

D．has informed

填空题

环磷酰胺属于（）类烷化剂，甲氨蝶呤是（）类拮抗剂。