题目内容

2．从4种不同的物种分离出的核酸中各种碱基的比率(%)如下：
(1)对于每个物种，回答：①核酸是DNA还是RNA？②它是双链还是单链？
(2)填充物种4中缺少的碱基百分比。

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9．非组蛋白染色体蛋白负责30nm纤丝高度有序的压缩。

2．AIDS病毒的遗传物质是______。

SECTION CNEWS BROADCAST
In this section,you will hear several news items.Listen to them carefully and then answer the questions that follow.
Questions 21 and 22 are based on the following news. At the end o f the news item,you will be given 10 seconds to answer the questions.
Now, listen to the news.
The Dow closed down at
[A] 180 point 2.
[B] 3,805.
[C] 5,549.
[D] 50 point 1.

此听力MP3下载地址：http://www.shangxueba.com/share/p3301345.html
SECTION B INTERVIEW
In this section you will hear everything ONCE ONLY. Listen carefully and then answer the questions that follow. Mark the correct answer to each question on your coloured answer sheet.
According to Chitra, _____ characters are considered to be not well depicted.
[A] imaginary
[B] lifeless
[C] unexciting
[D] emotionless