问题 选择题

下列关于氢氧化钠的叙述不正确的是

A.易溶于水,溶解时放出大量的热

B.对皮肤有强烈的腐蚀作用

C.水溶液能使紫色石蕊试液变红

D.是重要的化工原料

答案

答案:C

A、氢氧化钠是一种易溶于水的物质且溶于水时放出大量的热,能使溶液的温度明显升高.故说法正确;

B、氢氧化钠是一种腐蚀性很强的物质,对皮肤也有强烈的腐蚀作用.故说法正确;

C、氢氧化钠的水溶液呈碱性,能使紫色石蕊变蓝.故说法不正确;

D、氢氧化钠主要用于造纸、印染、炼油等工业,是一种很重要的化工原料.故说法正确.

故选C

单项选择题 A1型题
阅读理解

English nowadays is widely used in science, business, the media and popular culture. For example, 80% of e-mails on the internet are in English. But where will English be at the end of the 21st century?

One view is that English is going to become even more important as a global language, being most widely used in trade and media while some other languages will become less important or just disappear. Another view is that English is already breaking up into several separate languages. There are already dictionaries of the “New Englishes”, such as Australian English, full of words that a British English speaker would not recognize.

Hopefully, neither of these things will happen. Although different varieties of English will continue to develop around the world, standard English will survive for international       communication. However, it is impossible for one language to totally control the world. Already, other languages are fighting back against the control of English on the net. Governments around the world are also starting to protect smaller languages and recognize the importance of keeping a variety of cultures and languages. English will probably stay in control for a long time, but it certainly won’t become the only language in the world.

小题1: According to the situation, how many people do you think speak English now?

A.200 million

B.300 million

C.500 million

D.a billion小题2:At present, what is the most important language in the world?

A.Chinese

B.English

C.French

D.German小题3:What is the best title of the passage?

A.The Change of English

B.Different Varieties of English

C.The Future of English

D.The Cause of English Change