取a、b两份质量相等的氯酸钾,另在b中放少量高锰酸钾,分别加热,放出氧气的质量(

题型:选择题

问题:

取a、b两份质量相等的氯酸钾,另在b中放少量高锰酸钾,分别加热,放出氧气的质量(mo2)与时间(t)图象正确的是(  )

A.

B.

C.

D.

考点:催化剂和催化作用化学反应方程式的计算
题型:选择题

任务型阅读。

     Close your eyes for a minute and imagine what life would be like if you couldn't see. Imagine having to read

this page, not with your eyes but with your fingers. How do you feel, then?

     With medical knowledge and skills today, two-thirds of the world's 42 million blind people should not have

to suffer (受苦). Unluckily, rich countries have this knowledge, but developing countries do not.

     ORBIS is an international charitable organization (慈善组织). Its goal is to help fight blindness all over the

world. Inside a DC-8 airplane, there is a teaching hospital with television room and classroom. Doctors are

taught the latest technology of helping the blind get sight again here. ORBIS is always trying to keep a closer

relation among countries.

     ORBIS helps those developing countries by providing sight-saving training. It has taught over 35,000 doctors

and nurses. They continue to treat thousands of blind people every year. They have travelled around the earth 3

times, visited 76 countries and treated over 20,000 blind people. They need your help to continue their work and

free people from blindness.

     For just $38, you can help one person see; for $380 you can bring sight to 10 people; $1,300 helps train a

doctor new skills; and for $13,000 you can provide a training program for a group of doctors who can make

thousands of blind people see again. Your love can help them open their eyes to the world

1. 判断正误:“T”表示正确,“F”表示错误。

   ( ) Both rich and developing countries have the knowledge of helping blind people.

2. 完成句子:ORBIS' goal is to ____________________________________________. 

回答下列问题:

3. How many doctors and nurses has ORBIS taught?

   _____________________________________________________________________

4. What can you do for $380 according to the passage?

   _____________________________________________________________________

将文中划线句子翻译成中文。

5. _____________________________________________________________________

题型:选择题

二尖瓣狭窄最不可能引起下列变化的是()

A.左心房扩大

B.左心室扩大

C.右心房扩大

D.左心房肥大

E.右心室肥大

题型:选择题

癫癎与癔症有哪些区别?

题型:选择题

生产矿井主要通风机必须装有反风设施,要求反风设施在()内改变巷道的风流方向 。

题型:选择题

1947年,毛 * * 提出新民主主义三大经济纲领的讲话是()。

A.《论联合政府》

B.《目前形势和我们的任务》

C.《在晋绥干部会议上的讲话》

D.《迎接中国革命的新高潮》

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