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【单选题】
时间继电器在继电保护装置中的作用是()A.
计算动作时间
B.
建立动作延时
C.
计算保护停电时间
D.
计算断路器停电时间
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【简答题】This library is the (modern) ______ building I have ever visited in this city.
【单选题】It is reported that the worst pedestrian jam in this city occurs around this crossroads.
A.
confession
B.
congestion
C.
digestion
D.
exhaustion
【简答题】四种引起细菌基因重组的方式是______、______、______和______。
【单选题】Never before in greater need of modern public transport than it is today.has this city been (正确）this city has beenwas this citythis city was
A.
has this city been
B.
this city has been
C.
was this city
D.
this city was
【单选题】It is reported that the worst pedestrian jam in this city occurs around this crossroads.
A.
confession
B.
congestion
C.
digesfon
D.
exhaustion
【单选题】You will see this product____wherever you go in this city.
A.
advertise
B.
to be advertised
C.
advertised
D.
advertising
【简答题】Are there any places ofinterest in this city?
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