题目

下列结构或物质中不含有核糖的是（） A . 解旋酶 B . ADP C . HIV D . 核糖体 答案：A 阅读理解，阅读下列短文，从每题所给的A、B、C、D四个选项中选出最佳选项。 　　Everyone has got two personalities(性格)-the one that is shown to the world and the other that is secret and real．You don't show your secret personality when you’re awake because you can control your behavior, but when you’re asleep, your sleeping position shows the real you．In a normal night, of course, people frequently change their positions．The important position is the one that you go to sleep in． 　　If you go to sleep on your back, you’re a very open person．You normally trust people and you are easily influenced by fashion or new ideas．You don't like to displease people．So you never express your real feelings．You’re quite shy and you aren't quite sure of yourself． 　　If you sleep on your stomach, you are a rather secretive(守口如瓶的)person．You worry a lot and you’re always easily upset．You always stick to your own opinions or judgment, but you don't raise your hopes too much．You usually live for today not tomorrow．This means that you enjoy having a good time． 　　If you sleep curled up(蜷缩), you are probably a very nervous person．You have a low opinion of yourself and so you’re often defensive(有戒心的)．You’re shy and you don't normally like meeting people．You prefer to be on your own．You’re easily hurt． 　　If you sleep on your side, you have usually got a well-balanced(平衡的)personality．You know your strengths and weakness．You’re usually careful．You believe in yourself．You sometimes feel anxious, but you don't often get sad．You always say what you think even if it makes people rather angry． (1) You may find the passage in ________． [　　] A． a science magazine B． A guide book C． a sports newspaper D． a story book (2) When does the sleeping position best show your secret personality? [　　] A． In the daytime B． At the beginning of sleep C． At night D． During the deep sleep (3) Tina hardly tells her secrets to her friends．She probably goes to sleep ________． [　　] A． on curled up B． on her stomach C． on her back D． on her side (4) What does the passage tell us? [　　] A． Sleeping on your side is the best way of sleeping B． Changing positions will cause sleeping problems． C． Sleeping positions show people's secret personalities． D． Enough sleep makes people look better and healthier．