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颈卵器植物包括苔藓、蕨类和裸子植物。( )

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  • 【名词&注释】

    水溶性(water-soluble)、被子植物(angiosperm)、特征描述(feature description)、裸子植物(gymnosperm)、百合科(liliaceae)、料事如神、居庸关、多年生草本(perennial herb)、不挥发性(fixity)、滤过性

  • [单选题]颈卵器植物包括苔藓、蕨类和裸子植物。( )

  • A. 正确
    B. 错误

  • 查看答案&解析 点击获取本科目所有试题
  • 举一反三:
  • [单选题]DAndrew Ritchie, inventor of the Brompton folding bicycle, once said that the perfect portable bike would be “like a magic carpet…You could fold it up and put it into your pocket or handbag”. Then he paused: “But you’ll always be limited by the size of the wheels. And so far no one has invented a folding wheel.”
  • A. It was a rare — indeed unique — occasion when I was able to put Ritchie right. A 19th-century inventor, William Henry James Grout, did in fact design a folding wheel. His bike, predictably named the Grout Portable, had a frame. that split into two and a larger wheel that could be separated into four pieces. All the bits fitted into Grout’s Wonderful Bag, a leather case.
    B. Grout’s aim: to solve the problems of carrying a bike on a train. Now doesn’t that sound familiar? Grout intended to find a way of making a bike small enough for train travel: his bike was a huge beast. And importantly, the design of early bicycles gave him an advantage: in Grout’s day, tyres were solid, which made the business of splitting a wheel into four separate parts relatively simple. You couldn’t do the same with a wheel fitted with a one-piece inflated (充气的) tyre.
    C. So, in a 21st-century context, is the idea of the folding wheel dead? It is not. A British design engineer, Duncan Fitzsimons, has developed a wheel that can be squashed into something like a slender ellipse (椭圆). Throughout, the tyre remains inflated.
    D. Will the young Fitzsimons’s folding wheel make it into production? I haven’t the foggiest idea. But his inventiveness shows two things. First, people have been saying for more than a century that bike design has reached its limit, except for gradual advances. It’s as silly a concept now as it was 100 years ago: there’s plenty still to go for. Second, it is in the field of folding bikes that we are seeing the most interesting inventions. You can buy a folding bike for less than £1,000 that can be knocked down so small that it can be carried on a plane — minus wheels, of course — as hand baggage.
    E. Folding wheels would make all manner of things possible. Have we yet got the magic carpet of Andrew Ritchie’s imagination? No. But it’s progress.
    F. 69. We can infer from Paragraph 1 that the Brompton folding bike .
    G. was portable
    H. had a folding wheel
    I. could be put in a pocket
    J. looked like a magic carpet

  • [单选题]下列各句,都能表现朱棣“料事如神”的一组是 (3分)
  • ①居庸关山路险峻,北平值襟喉 ②譬之人家后户,岂容弃与寇盗 ③今乘其初至,又兼剽掠,民心未服,取之甚易 ④贼众新集,其心不一 ⑤乘其未定,击之必破 ⑥乃以其家人为前锋,用其旧日旗帜

  • A. ①③⑥ B.②③⑤ C.②④⑤
    B. ③④⑤

  • [单选题]种子植物具有双受精现象。( )
  • A. 正确
    B. 错误

  • [单选题]The underlined word "deter" in Paragraph 3 most probably means .
  • A. discourage
    B. remove
    C. benefit
    D. free

  • [单选题]利用蒸馏法制备注射用水除热原是利用热原的哪种性质( )。
  • A. 耐热性
    B. 不挥发性(fixity)
    C. 水溶性
    D. 滤过性
    E. 不被吸附

  • [多选题]在对木樨科的特征描述中,正确的是( )。
  • A. 多年生草本(perennial herb)
    B. 叶常对生
    C. 花辐射对称,花被常4裂
    D. 雄蕊4枚
    E. 子房上位,2室

  • [单选题]InParagraph2,theauthorusesjazzanexampleto
  • A. compareitwithrockmusic
    B. showmusicidentifiesasociety
    C. introduceAmericanmusicaltraditions
    D. provemusicinfluencespeople’slifestyles

  • [单选题]不具花被的分类群是( )。
  • A. 木兰科
    B. 杨柳科
    C. 石竹科
    D. 百合科

  • [单选题]一个新种的形成,必须具有一定的生殖隔离度。( )
  • A. 正确
    B. 错误

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