下列各组比较不正确的是[ ] A.铷与水的反应现象与钠相似 B.还原性:K>Na

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问题:

下列各组比较不正确的是[ ]

A.铷与水的反应现象与钠相似

B.还原性:K>Na>Li

C.熔点:Li>Na>K

D.碱性:LiOH> NaOH> KOH

考点:元素周期律
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陈独秀认为:“无论政治学术道德文章,西洋的法子和中国的法子,绝对是两样,断不可调和迁就的……若是决计革新,一切都应该采取西洋的新法子,不必拿什么国粹、国情的话来捣乱。”这表明陈独秀(  )

A.主张推翻封建专制政体

B.推崇西方民主与科学思想

C.积极宣传社会主义思想

D.主张辩证地看待中国传统文化

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下列各组中,两物质均能使有色试剂褪色,但褪色原理不相同的一组是

A.乙炔和乙烯均能使溴水褪色

B.Cl2和SO2均能使品红褪色

C.油脂和乙酸乙酯均能使含酚酞的NaOH溶液褪色

D.甲苯和乙苯均能使酸性KMnO4褪色

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在自然种群中,基因库代代相传,永远保持稳定。( )

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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 colour 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.

小题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小题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小题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

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25T型车火灾报警系统不能查询全列车报警及故障历史数据。

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