问题 填空题

如下图是实验室制取气体的常用仪器。请根据要求填空:

(1)图中仪器名称是②____________,

(2)小宝同学用氯酸钾和二氧化锰制取并收集一瓶氧气,应选择上图中的仪器____________(填序号,以下同),

(3)小茹同学用锌和稀硫酸制取H2,同时生成硫酸锌,则应选择上图中____________装置.

(4)小佳同学查阅资料得到制取硫化氢气体的如下信息,请回答下列问题:

气体实验药品反应条件气体物理性质
H2S硫化亚铁固体与稀硫酸不需加热无色,密度比空气大,可溶于水
制取硫化氢____________(填“可以”或“不可以”)采用装置①,理由是                 

答案

(1) 锥形瓶 (2) ①④⑤⑨(或①④⑥⑦)  (3) ②③⑥⑦  (4) 不可以 反应不需要加热

 

题目分析:根据所学知识可知,(1)图中仪器名称是②为锥形瓶,(2)小宝同学用氯酸钾和二氧化锰制取并收集一瓶氧气,应该组装固体加热性装置,故应选择上图中的仪器为①④⑤⑨,(3)小茹同学用锌和稀硫酸制取H2,同时生成硫酸锌,应该组装固液常温型装置,则应选择上图中装置②③⑥⑦ .(4)根据题中所提供的信息可知制取硫化氢不可以采用装置①,理由是反应不需要加热,

阅读理解

English is spoken as a first language by most people in the USA,Britain,Australia,New Zealand,Ireland and Canada. However,English is spoken all over the world. It is the main language in over 60 countries,including India,Singapore and many of the Caribbean and Pacific islands. In these places English is often a second language.

English is also an international language in many other countries,like China and Japan. People in these countries use it for business,and travelers to these countries use English when they get there to communicate. Other people may learn English because they enjoy reading books in English,listening to British or American music or watching American films.

English has changed a lot over the years and still goes on changing. It is no longer right to talk about British English or American English if the speakers come or don’t come from those countries. People in Japan and Korea,for example,may use the American spelling but may not sound like Americans.

English will probably be the most widely used language in the world by the end of the 21st century. This language no longer belongs to British,American or Australian speakers. It belongs to anyone in the world. So,as a middle school student of English today, think about how you can use this language. After you leave school, you will almost certainly need it.

小题1:In how many countries is English spoken as a first language in the passage?

A.Five.

B.Four.

C.Three.

D.Six.小题2:In which other countries is English spoken as a main language?

A.Britain, the USA and Australia.

B.India, Singapore and many of the Caribbean and Pacific islands.

C.China and Japan.

D.New Zealand and Canada.小题3: People from other countries learn English for ________.

A.passing exams

B.business and traveling

C.reading English books, enjoying English music or films

D.both B and C小题4:Even if people in Japan and Korea use American spelling they ________.

A.will speak the same as Americans

B.may not sound like Americans

C.will speak British English

D.will speak English much better小题5: Which is the best title for the passage?

A.A First Language in the World

B.A Second Language in the World

C.English around the World

D.A Useful Language

选择题