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【多选题】
有关结构防排水的一般要求，下列说法正确的有（）。A.
衬砌背后或隧底设置盲沟时，沟内应以石质坚硬、不易风化且尺寸不大于15cm的片石充填
B.
设置在软弱围岩区段的盲沟和有管渗沟，其侧做砂砾石反滤层或用无纺布包裹，并不得堵塞水路
C.
墙背泄水孔必须伸入盲沟内，泄水孔进口标高以下超挖部分应用同级混凝土或不透水材料回填密实
D.
墙背泄水孔、排水管内应清除杂物，防止堵塞水路
E.
寒冷地区保温水沟施工有防潮措施，以防止保温材料受潮、影响保温性能
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【简答题】阅读理解。 An man fell out of his plane and fell back into it again. Two people rowed (划) a small boat from New York to England in 56 days. One person was so big, he wouldn't fit in any hospital room. Woul...
【单选题】The plane crashed and all the passengers _____including 3 children, fell into the sea.
A.
around
B.
aboard
C.
abroad
D.
ahead
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