正确答案: B

倒生胚珠

题目：胚珠在胚柄上的各种着生方式中以( )最为常见。

解析：B

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举一反三的答案和解析：

[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.”

was portable

[单选题]The author used to think of her mother’s English as ______.

imperfect

[单选题]下列词语中加点的字，读音全都正确的一组是

奇葩（pā） 刎（wěn）颈之交 睥睨（nì） 猝（cù）不及防

[单选题]What does the text tell us about Fijian people ?

They stick to a traditional way of lift

[单选题]

argue

[多选题]关于甲地的叙述，正确的是

日落时刻为地方时18时

甲地的地球自转线速度大于丙地

解析：AD

[单选题]研究发现，上述两种方法虽然在化学原理上都是可行的，但在实际应用中仍存在很多问题，例如： （ ）①方法Ⅰ将受到地域的限制

①②

[单选题]thenewmovie_____tobe oneofthebiggestmoney-makersofall time .

promises

[单选题]减缓温室气体排放是2009年哥本哈根气候变化会议的议题。下列反应不产生温室气体的是

用氨制碳酸铵