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【多选题】
关于新城区开发城市综合管廊,说法正确的是:A.
综合管廊是集各类管、线、缆等集中于一个地下通道中，便于管理、检修等。
B.
断面形式一般为矩形，可以充分利用空间。
C.
施工方法以明挖法居多。
D.
施工方法以暗挖法居多。
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【简答题】当关键字集合很大时,关键字值不同的元素可能会映象到哈希表的同一地址上,即 k1≠k2 ,但 H(k1)=H(k2),这种现象称为____________。
【简答题】在钢琴演奏中,和弦的演奏是一项非常重要的()
【简答题】The ideal college would be a kind of educational retreat in which you could try to find yourself; find out what you like and want; what you are and are not good at.
【单选题】On modern ships, centrifugal pump with a self-primer has replaced reciprocating pump as bilge pump because（）
A.
centrifugal pump is cheaper than reciprocating pump
B.
the size of centrifugal pump with same capacity is smaller than that of reciprocating pump
C.
centrifugal pump makes maintenance easier than reciprocating pump does
D.
all of the above
【单选题】S1: What are the main kinds of pumps on board ship? S2: Besides the centrifugal pump, there are reciprocating pump, vane pump, gear pump and screw pump . Q:What kinds of pumps are there not mentioned ...
A.
Reciprocating
B.
Vane pump
C.
Gear pump
D.
Injection pump
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