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【单选题】
用万用表欧姆档测量二极管的正向电阻和反向电阻时，若两次测量的电阻值相差很大，则说明管子（）A.
单向导电性能好
B.
PN结已被击穿
C.
内部引线断开或被烧毁
D.
0
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皮皮学刷刷变学霸
举一反三
【单选题】China started its nuclear power industry only in recent years, and should ______ no time in catching up.
A.
delay
B.
lose
C.
lag
D.
lessen
【简答题】China started its nuclear power industry only in recent years, and should ________ no time in catching up. A) delay B) lose C) lag D) lessen
【单选题】China Daily was first released in 1981 and its European Weekly started in 2010, which is____ in nearly 30 countries in Europe and prints around 100000 copies.
A.
relevant
B.
contemporary
C.
controversial
D.
available
【单选题】China only started its nuclear power industry in recent years, and should______no time in catching up.
A.
lose
B.
delay
C.
spare
D.
relieve
【单选题】. The Bank of China, having so far woven its network in 27 countries, ______ its business in Brazil in June 2009.
A.
has started
B.
was starting
C.
will start
D.
started
【简答题】The development of China and the world started to be __________ (同步) after China joined the WTO.
【单选题】China started its space industry only in recent years, and should _______ no lime in catching up.
A.
delay
B.
lag
C.
lessen
D.
lose
【简答题】装饰抹灰工程中抹灰分层进行。厚度≥ mm或不同材料交接处,采取加强措施,加强网与各基体的搭接宽度不应小于 mm。
【多选题】一级节流中间不完全冷却的双级蒸汽压缩制冷循环与一级节流中间完全冷却的双级压缩制冷循环在工艺流程上的主要区别是（ ）。
A.
低压级压缩机排汽不进入中间冷却器
B.
中间冷却器排出汽体与低压级排汽在管道上混合后再进入高压级压缩机
C.
高压级吸入的是过热蒸汽而不是饱和蒸汽
D.
低压级排汽不向中间冷却器放热
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