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【多选题】
与自然循环汽相比,控制循环汽特点有( )。A.
循环流动推动力不同主要靠循环泵
B.
控制循环循环倍率更低
C.
管径更小，布置更自由
D.
汽包直径更小，壁更薄
E.
启停炉更快
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举一反三
【单选题】'Bridging the gap'(Line 1 ,Para. 4) is used in the passage to refer to ______.
A.
teaching old people more information about the modern technology
B.
asking young generation to get used to the traditional ways of communication
C.
using modern technology to invent easy ways to communicate for old people
D.
neglecting the difference between young and old generations in communication
【简答题】(Para. 1) misdemeanor
【单选题】The word 'confine' (Line 1. Para. 4) most probably means ______.
A.
controlled
B.
defined
C.
restricted
D.
forgiven
【单选题】The expression 'out-of-the-box'(Line 1. Para. 4) most probably means______.
A.
traditional
B.
logical
C.
invariable
D.
inspirational
【简答题】(Para. 2) ___________________________________________________________。
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