问题 填空题

在实验室中,配制500g0.9%的生理盐水:

(1)该实验必备的仪器有托盘天平、药匙、胶头滴管、量筒、细口瓶、烧杯和            

(2)该实验的主要步骤有计算、         、溶解、装瓶并贴标签;

(3)若稀释浓硫酸,为了实验安全,应将      沿容器壁慢慢地注入     中,并不断搅拌。

答案

(1)玻璃棒 (2)称量 (3)浓硫酸;水 

解:(1)配制溶液需要用到的仪器有:烧杯、玻璃棒、量筒、胶头滴管、天平、药匙;所以还需要玻璃棒;

(2)配制溶质质量分数一定的溶液的基本步骤:计算、称量、量取、溶解、装瓶存放,所以所填空为计算;

(3)由于浓硫酸密度比水大,且溶于水放出的热量能使水沸腾,所以要把浓硫酸沿着容器壁慢慢倒入水中,并用玻璃棒不断搅拌。

阅读理解

任务型阅读

       He is a young man who seems to have brains in his feet as well as his mind.

       Brazilian(巴西的) football star Ricardo Kaka's performances make the point well. He is one of the

top scorers in the UEFA Champions League(欧洲冠军杯).  Kaka helped AC Milan beat Manchester

United 3 -0. The win took Kaka and AC Milan to the finals of the UEFA cup in 2007.

Like many Brazilian football players, Kaka is now world famous. But he is not like most Brazilian players. Most of his pals were once poor. Football made them famous and rich.

The 27-year-old Kaka is a different kind of star.

He was born in a rich family and enjoyed a comfortable early life. He joined Sao Paub club at eight and

signed as a professional(职业的 )

player at 15.  Three years later, he was the best player in the team.

      "I plan my career(事业) by setting myself goals," he explained." My goals drive me, they are what I

fight for. "

      And his next goal is to help the poor children.  "When I was with the national learn, we went to play

in some of the poorer areas. " He said.  "You see children who don't have enough to eat. "

      Kaka believes he can do some thing. Since November 2004, Kaka has been an Ambassador(大使) Against Hunger for the UN World Food Program.

根据短文内容,完成下列各题。

l. Ricardo Kaka is one of the          in the UEFA Champions League(欧洲冠军杯) .

2. Kaka is           years old this year.

3.  Ricardo Kaka's next goal is to            .

4. Ricardo Kaka went to play in some of         _ when he was with the national team.

5. Kaka has been an Ambassador(大使) Against Hunger for the UN World Food Program since         .

名词解释