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【单选题】
日常生活中的下列做法存在安全隐患的是 ①机动车推广使用乙醇汽油； ②液化石油气罐中残留液体倒入下水道； ③为降低居室甲醛含量，新装修住房应紧闭门窗，并放置一盆水； ④天然气泄漏立刻打开抽油烟机；⑤节日大量燃放烟花爆竹，增加喜庆气氛。A.
全部
B.
除①外
C.
除①③外
D.
除③⑤外
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A.
there be
B.
there will be
C.
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D.
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B.
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C.
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D.
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【单选题】What is the function of the last paragraph?
A.
It cites a specific case that illustrates what complexity a complaint might cause at last.
B.
It introduces an additional area of concern not mentioned before.
C.
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D.
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