下列选项中，能判断正压式呼吸器压力低报警的是：（）。A、指示灯闪烁 B、声音报警 C

易感儿接触水痘后隔离观察（）。

A.1周

B.2周

C.3周

D.10天

E.4周

在某次跳水比赛中，11位评委给一名中国选手打分如下：9.5、9.4、9.4、9.3、9.3、9.3、9.3、9.2、9.1、9.1、8.8

（1）这组数据的平均数是______，中位数是______，众数是______．

（2）如果按照“去掉一个最高分，去掉一个最低分”再计算平均分的评分方法计算，平均分是多少？

你认为这样做是不是有道理？为什么？

不符合胶片保存条件的是（）

A.胶片在10～15℃保存

B.储存条件要标准

C.避免有害气体接触

D.防止压力效应的产生

E.有效期限出厂24个月

下列句子中，加粗的成语使用恰当的一项是[ ]

A．时下商业竞争愈演愈烈，实力强弱固然是决定双方胜负的重要因素，但调查市场、调整结构也是出奇制胜对手的重要手段。   

B．保持文化的定力，必须头脑清醒、心中有数，绝不能削足适履，误入别人的文化藩篱，从而成为强势文化的附庸。   

C．如果把这些现有的曲艺概念奉为清规戒律来规范和约束现实中正在发展变化着的曲艺艺术，就会出现理论脱离实际的问题。   

D．《密战》尝试大幅度引入科技元素，这既与当今时代保密防谍工作高科技和信息化特色相结合，又呈现了令观众焕然一新的现代化荧屏景观。

阅读理解。

     There are several ways you can find out about the countries and places you wish to visit. You can talk

to friends who have travelled to the places. Or you can go and see a color film. Or you can read travel books.

     It would seem that there are three kinds of travel books. The first are those that give a personal, subjective

(主观的) account of travels which the author has actually made himself. If they are informative and have a

good index (索引), then they can be useful to you when you are planning your travels. The second kind are

those books whose purpose is to give a purely objective (客观的) description of things to be done and seen.

If a well-read, cultured person has written such a book, then it is even more useful. It can be sorted as a

selected guide book. The third kind are those books which are called"a guide" to some place or other. If they

are good, they will, in addition to their factual information, give an analysis or an explanation. Like the first

kind they can be inspiring and interesting. But their basic purpose is to help the reader who wishes to plan in

the most practical way.

     Whatever kind of travel book you choose you must make sure that it does not describe everything as

"wonderful", "excellent" or"magical". You must also note its date of publication because travel is a very

practical affair and many things change quickly in the twenty-first century. Finally, you should make sure

that the contents are well presented and easy to find.

1. This passage is about _____.

A. how to travel

B. how to buy travel books

C. how to read a travel book

D. travel books

2. The following travel books may be of use when you plan your travels except ____.

A. the book written by some people who have had the same travel experience themselves

B. the book which tells you what is worth doing and seeing based on the facts

C. the book in which a lot of big adjectives are used to draw your attention

D. the book which offers you a lot of useful information like a tour guide

3. The date of the publication must be noticed because ______.

A. the world is changing and so are the places you are going to visit

B. the price of the book is always changing

C. the author of the book may be different

D. the contents of the book are always the same