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2002年12月26日，俄罗斯特种部队使用强力麻醉剂芬太奴（Fentanyl）和氟烷（Halothane）。下列有关氟烷（CHClBr—CF 3 ）说法正确的是： A 该氟烷易溶于水，也易溶于有机溶剂 B 该氟烷扩散到空气中能破坏臭氧层 C 该氟烷密度比 D与该氟烷互为同分异构体的氟烷（不含本身）有三种
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【简答题】There are 20 incomplete sentences with four suggested answers. Choose the one that best completes the sentence. 1. Divorce doesn ’ t necessarily mean separation in Cuba, where couples have often been ...
【单选题】What word is wrong in this sentence? There has been a lot of problems at my work lately, but we have been dealing with them.
A.
has
B.
lot
C.
problems
D.
work
E.
have
F.
them
【单选题】听力原文： There have been many great inventions, things that changed the way we live. The first great invention was one that is still very important today—the wheel. For hundreds of years after that there...
A.
In the early 1800's.
B.
In the late 1800's.
C.
In the second half of the 19th century.
D.
In the first part of the 20th century.
【简答题】A; Susan,any plans for tomorrow? B;Yeah, 16 A;How exciting ! B;It’s a rock music concert 17 A;No ,it’s too noisy for me .Thank you anyway. B; 18 A;I like country music. B;Really? I know there’s a coun...
【单选题】听力原文： There have been many great inventions, things that changed the way we live. The first great invention was one that is still very important today -- the wheel. This is used in cars, trucks, and t...
A.
The tractor.
B.
The ear.
C.
The wheel.
D.
The steam engine.
【简答题】重新排列以下句子，组成一个完整的对话。 A. I wish, too. I believe we will have a great time there. B. Neither have I.I want to go there. I want to go to the space museum, too. C. Yes. Now it's getting late. Where will yo...
【简答题】Part B Directions: In the following article some paragraphs have been removed. For Questions 66-70, choose the most suitable paragraph from the list A-F to fit into each of the numbered gaps. There is...
【单选题】听力原文： There have been many great inventions, things that change the way we live. The first great invention was one that is still very important today—the wheel. This made it easier to carry heavy thin...
A.
In the second half of the 19th century.
B.
In the 1960s.
C.
In the first half of the 20th century.
D.
In the early 1800s.
【简答题】2017河南中考阅读理解C The idea that red means stop and green means has influenced our lives in more ways than just traffic signals(信号).We have been taught from a young age that the color red means er and ...
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