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【简答题】
当密度ρ= 1000kg .m 3 ,粘度μ =1 厘泊的水,在内径为 d=100mm ,以流速为 1m .s -1 在流动时,其雷诺准数等于 __________ ,其流动类型为 ______ 。
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皮皮学刷刷变学霸
举一反三
【简答题】It was so cold that they kept the fire all night．
【单选题】杨柳青年画继承宋、元绘画传统,吸收了明代木刻版画、工艺美术、戏剧舞台的形式,具有()、笔法匀整、色彩鲜艳、内容丰富等特色。
A.
造型准确
B.
夸张变形
C.
构图丰满
D.
题材丰富
【单选题】All night long people dance and sing. They do this ____.
A.
during the whole night
B.
in all the night
C.
the night long
D.
in the night
【单选题】At night the road outside my bedroom was very noisy and I was_____ all night.
A.
kept waking
B.
keeping awake
C.
kept awake
【单选题】The servant __________ all day and all night．A.made to workB.was made to workS
A.
The servant __________ all day and all night． A.made to work
B.
was made to work
C.
was made work
D.
was made working
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