屋面防水施工,防水层及附加层伸入水落口杯内不应小于(),并应粘结牢固。
A、50mm
B、100mm
C、20mm
参考答案:A
Their house _____ in the big fire, so they decided to build another one.
A.has been destroyed.
B.had destroyed
C.had been destroyed
D.destroyed
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