问题 问答题 简答题

独立分配规律的实质何在?

答案

参考答案:

减数分裂时,等位基因随着同源染色体的分开而分离,异位基因随着非同源染色体的自由组合而随机分配,这就是独立分配规律的实质。

单项选择题
写作题

读写任务。阅读下面的短文,然后按照要求写一篇150词左右的英语短文。

     A grand memorial service was held Wednesday, October 28, 2009 in central Hubei Province to honor three

college students who died rescuing two children from the Yangtze River on October 24.Thousands of people

holding chrysanthemum flowers went to the Jingzhou Memorial House to see off the teenagers, all 19-year-old

students from the Yangtze University based in Jingzhou City.

     The trio were Chen Jishi, He Dongxu and Fang Zhao. More than 10 students from the Yangtze University

formed a ladder with one student holding another's arms to rescue the two boys in the river on the afternoon

of October 24. One of the students lost his grip on his classmates and all of them were in danger. Several

members of a winter swimming team nearby came to help. Chen Jishi, He Dongxu and Fang Zhao were swept

away in the torrent, but others were saved. People touched by their selfless act had donated more than 500,000

yuan ($73,206) to their relatives as of Wednesday, Zhang said. Millions of Internet users made online comments

on major news portals to show their grief.

     "I am also a college student. I feel sorrow for you," said "Liu Zhuoya," from northwestern Xi'an City.

However, some questioned the sacrifice. "Sacrifice (牺牲) three and rescue two, is that worthwhile?" asked

"Tiaozhantianya" on the forum of www.163.com. "Rescue can not be blind as they could not swim."

【写作内容】

     1. 以约30个词概括短文的内容要点;

     2. 以约120个词就“救人是否要考虑自身安全?”的主题发表看法,内容包括:

         (1) 当别人有难时,你是否会马上伸出援手?为什么?

         (2) 救人时是否要考虑自身的安全?(可以举例说明)

         (3) 假如你当时在场,你会怎样做?

【写作要求】

     1. 可以使用实例或其他论述方法支持你的论点,也可以参照阅读材料的内容,但不得引用原文中

         的句子;

     2. 文中不能出现真实姓名和学校名称。 

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