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【单选题】
关于本工程坡屋面的防水等级说法正确的是( )。A.
Ⅰ级,设置一道防水
B.
Ⅱ级,设置一道防水
C.
Ⅰ级,设置两道防水
D.
Ⅱ级,设置两道防水
拍照语音搜题，微信中搜索"皮皮学"使用
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A.
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to each other
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