问题 单项选择题

下列有关各RNA分子的叙述,错误的是

A.mRNA分子中含有遗传密码

B.tRNA是蛋白质合成中氨基酸的载体

C.hnRNA是tRNA的前体

D.mRNA的3′末端有多聚A结构

E.rRNA参与组成核蛋白体

答案

参考答案:C

解析:[试题难度] 难[认知层次] 理解 本题主要测试对各RNA分子结构、亚细胞分布、功能的了解程度。 RNA主要有mRNA、tRNA和rRNA等。mRNA分子中含有遗传密码,作为蛋白质合成的模板;tRNA作为氨基酸转运载体;rRNA参与组成核蛋白体而作为蛋白质的合成场所。hnR-NA存在于核内,是mRNA的前体,而mRNA、tRNA和rRNA等主要存在于细胞质中。本题准确答案是C。

单项选择题 A3/A4型题
写作题

第二节:读写任务(共1小题,满分25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。

On May 7, nineteen-year-old Hu Bin, after drinking, knocked a man to death when he was driving his sports car at an extremely fast pace between 84.1 k/h to 101.2 k/h. Hu was sentenced into prison for three years, according to the final judgment. Out of a hope for better traffic regulation and more drivers with loving hearts, Hangzhou City has since set up several special zebra crossings, which are wider, color-changed, and feature loving hearts wrapped up in the middle.

On August 4, a sixteen-year-old girl was crashed into by a black Porsche Cayenne and dead while crossing the street in Hangzhou City. The driver, 29-year-old Wei Zhigang, and his fiancé, who was also in the car when the accident took place, were both found drunk. According to witnesses, the Porsche Cayenne was speeding at more than 80 kilometers per hour at the time. The victim, Ma Fangfang, is a waitress in a restaurant in Hangzhou. She was walking on the zebra crossing when the Porsche Cayenne violently charged toward her and knocked her away. Wei Zhigang, the driver of the Porsche Cayenne, together with his fiancé, was detained and investigated by the Public Security Organ in Hanghzhou. Ironically, the zebra crossing where the accident took place is titled the “Zebra crossing of Living Hearts” in memory of the May 7 car accident in Hangzhou.

[写作内容]

1.    以约30个词概括短文的要点。

2.    以约120词对“酒后驾车”事件发表看法,并要包括下列要点:

(1)酒后驾车的危害;

(2)该不该严厉处罚醉酒驾车者,为什么?

[写作要求]

1.    作文中你可以使用自己的亲身经历或虚构的故事,也可以参照阅读材料的内容,但不能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。