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【简答题】
Cable systems began tying to use ______ to capture the signals from distant stations in the early 1950s.
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举一反三
【单选题】第三节 短文理解2 阅读下列短文，从[A]、[B]、[C]三个选项中选择一个正确答案。 Food in Britain has had a bad name abroad for a very long time. Visitors from foreign countries complain(抱怨) about the meals that they order in restaurants....
A.
cost less
B.
become better
C.
be served a longer time
【单选题】Choose the best paraphrase for the following source:More than 300 historians reacted by signing an open letter to the Guardian newspaper in which they said: "As historians of Britain and of Europe, we...
A.
Many historians in the UK are in favor of remaining in the European Union and over 300 of them signed an open letter to the Guardian about Britain's significant place in Europe.
B.
Over 300 historians signed an open letter to the Guardian, claiming that Britain has always been having an irreplaceable role to play in Europe.
C.
Historians claimed that they believed that Britain had always been playing an irreplaceable role in Europe.
D.
According to a report from China Daily, more than 300 historians signed an open letter to the Guardian newspaper in which they said: "As historians of Britain and of Europe, we believe that Britain has had, in the past, and will have in the future, an irreplaceable role to play in Europe."
【判断题】Britain has always been culturally and ethnically diverse. There are many differences between England, Wales, Scotland and Northern Ireland and distinctive ways of life and identities within each nati...
A.
正确
B.
错误
【简答题】若集合A={ -2＜ ＜1}，B={ 0＜ ＜2}则集合A∪B=（ ） A．{ -1＜ ＜1} B．{ 0＜ ＜1} C．{ -2＜ ＜2} D．{ -2＜ ＜1}
【单选题】某吸附指示剂pKa = 5.0,以银量法测卤素离子时,pH应控制在( )
A.
pH 〉 5.0
B.
pH 〈5.0
C.
5.0 〈pH 〈10.0
D.
pH〈 10.0
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