产生国际重复征税的根本原因在于各国( )。A．政体的不同 B．主体税种的不同 C．关

机大绳较重时，可用机械动力穿大绳。

患者，男性，68岁，进行性记忆力下降2年，主要为近记忆障碍，伴有命名障碍，失语，计算力下降及精神异常，无意识障碍，无卒中病史。头颅MRI检查显示：脑皮质萎缩及侧脑室扩张，最可能的诊断是（）

A.轻度认知障碍

B.抑郁症

C.帕金森病痴呆

D.Alzheimer病

E.额颞痴呆

读写任务（共1 小题，满分20 分）

     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 from rescuing two children from the Yangtze River on October 24.

Thousands of people holding chrysanthemums （菊花）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 （三位）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 student lost his grip （控制）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. People touched by their selfless act had

donated more than 500,000 yuan( $73 ,206) to their relatives on Wednesday. Millions of Internet users

made online comments on major news portals （入口）to show their grief( 悲伤) ．

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

However,some questioned the sacrifice.“Sacrifice 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 个词概括短文的要点。

    2 ．以约120 个词就“救人是否要考虑自身安全”这个主题

发表你的看法，至少包括以下要点：

    1) 当别人有难时，你是否会马上伸出援手？为什么？

    2) 救人时你是否会考虑自身的安全？

    3) 假如你当时在场，你会怎样做？

     写作要求：

    1 ．你可以使用实例或其他论述方法支持你的观点，也可以

参照阅读材料的内容，但不得直接引用原文中的句子；

    2 ．作文中不能出现真实姓名和学校名称。

     评分标准

     概括准确，语言规范，内容合适，篇章连贯。

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记录讲话时，把可有可无或重复的语句删去，尽可能做到既要注重精，还要注重详，需采用（）记录法。

A.纲要

B.精详

C.精要

D.补充

飞机的重心位置对飞机的哪个稳定性有影响（）

A.纵向稳定性和航向稳定性

B.只对纵向稳定性

C.横向稳定性