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下列关于氧气物理性质的说法,错误的是( )

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  • 【名词&注释】

    物理性质(physical properties)、生活环境(living environment)、化学性质(chemical properties)、人生态度(life attitude)、可燃性(flammability)、社会现象(social phenomenon)、时间表(schedule)、略大于(slightly larger)、绝对贫困人口、绝对贫困线

  • [单选题]下列关于氧气物理性质的说法,错误的是( )

  • A. 通常状况下氧气是无色,无气味的气体
    B. 鱼类能在水中生活,证明氧气易溶于水
    C. 通常状况下,氧气的密度略大于(slightly larger)空气
    D. 通过低温加压,可使氧气液化成淡蓝色的液体

  • 查看答案&解析 点击获取本科目所有试题
  • 举一反三:
  • [单选题]下列对原文有关内容的概括与分析,正确的一项是
  • A. 【甲】文的莲花和【乙】文的兰花生活环境虽有区别,但都有高洁、纯朴的品质。
    B. 【甲】【乙】两文都表明了要退隐山林、藏善以待时机施展自己才华的人生态度。
    C. 【甲】文批判了菊和牡丹的傲然超脱;【乙】文则赞美了萧艾和兰花的清香宜人。
    D. 【甲】【乙】两文都涉及到了作者所鄙视的那些追功名、逐富贵的社会现象。

  • [单选题]28. —Is Jack in the library?—Maybe.l saw him _________'out with some books just now.
  • A. going
    B. go
    C. to go
    D. went

  • [单选题]BIt seems that travelling is very important in modern(现代的)life. The fastest way of trav- elling is by plane. You can travel by plane in one day to a place that it took a month or more to
  • B. But it has its advantages(优势). You can enjoy the scenery of the places you're travelling through. Modern trains have comfortable seats and.dining cars.
    C. There are large liners or river boats. You can visit many other countries and different parts of your country on them. Ships are not so fast as trains or planes ,but travelling by sea is a very pleasant way to spend a holiday.Many people like to travel by car. You can make your own timetable(时间表(schedule)). You can travel three or four hundred miles or only fifty or one hundred miles a day ,just as you like.You can stop wherever you wish-at a place where there is something interesting to see ,at a good restaurant where you can enjoy a good meal ,or at a hotel to spend the night. That is why trav-elling by car is popular for pleasant trips ,while people usually take trains or planes when they are travelling on business.
    D. From the passage ,we know the fastest(最快的)way of travelling is _________ .
    E. by sea
    F. by train
    G. by car
    H. by plane

  • [单选题]收入处在绝对贫困线之上但很接近,易受外部影响的贫困人口是( )。
  • A. 绝对贫困人口
    B. 极度贫困
    C. 相对贫困人口
    D. 临界贫困人口

  • [单选题]“飞天壮歌—一-—中国首次太空漫步航天展”于5月24 日在南京展区圆满结束。航天所用燃料之一为液氢,下列说法中属于H2的化学性质的是
  • A. 液氢燃烧 B.氢气是最轻的气体
    B. 氢气具有可燃性 D.燃烧产生淡蓝色火焰

  • [单选题]BJim was a waiter. He liked to grow flowers in his garden when he was free. One Sunday morning after breakfast he put on his old clothes and began digging(挖) in his garden at 8. He dug and dug. Half an hour later he suddenly found a coin near his foot. He was very glad. He put it in his right pocket. A few minutes later,he found anotherone. He picked it up and p...hit in the same pocket.The same thing happened for the third,the fourth and the fifth time…: He was very happy and told his wife about it. She was very happy,too. She said,"A thief took away a lot of coins from a shop a few days ago. The police caught him but they didn't find any coins. Then Jim went on digging some coins,but just when he began to dig,he felt something cold in his trousers... It ran down one of his legs. He put his hand down quickly and the coin came into his hand. Now he knew there was a hole in his right pocket.
  • A. There were some _________ in Jim's garden.
    B. flowers
    C. coins
    D. people
    E. trees

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