问题 填空题

(1)20 ℃时,硝酸钾的溶解度为31.6 g,其含义是:在20 ℃时,                 

(2)在t ℃时,将一定质量的某不饱和硝酸钾溶液分成等质量的A、B两份。在恒温下,将A溶液蒸发掉5 g水,析出1 g晶体;在恒温下,将B溶液蒸发掉10 g水,析出3 g晶体。则t ℃时硝酸钾的溶解度为        g。

答案

(1)100 g水中溶解31.6 g硝酸钾就达到饱和状态

(2)40

(1)运用溶解度的概念解答。(2)在恒温下,将A溶液蒸发掉5 g水,析出1 g晶体;在恒温下,将B溶液蒸发掉10 g水,析出3 g晶体。可知5 g水中溶解2 g硝酸钾即可饱和,所以该温度下硝酸钾的溶解度为40 g。

阅读理解

Spiderman is one of the most famous comic book heroes of all time.He was created by Stan Lee in 1963 and was first introduced to the world in the pages of Marvel comic books.

Spiderman’s story is the story of Peter Parker,a child who lost his parents and lives with his aunt and uncle.Peter is a shy,quiet boy wearing glasses and has few friends.One day,on a high school class trip to a science lab,he gets bitten by a special spider.Soon Peter realizes he has amazing powers:he is as strong and quick as a spider and also has a type of sixth sense.He no longer needs his glasses and he can use his super power to fly through the city streets! Remembering something his Uncle Ben has told him,that“with great power,there must also come great responsibility(责任),”Peter decides to use his powers to fight enemies who do cruel things to people.And so,Spiderman is born.

Life is not easy for Peter even though he is a superhero.He is in love with Mary Jane but cannot tell her about his amazing powers.Besides,his best friend Harry hates Spiderman! Peter is also short of money and time.He has to sell photos of Spiderman(himself!)to a newspaper and he keeps losing his other jobs because he’s so busy saving people! Yet he has to fight different kinds of cruel enemies.

小题1:Who created Spiderman?

A.Stan Lee.

B.Marvel.

C.Peter Parker.

D.Superman.小题2:What happened to Peter Parker after he was bitten by the spider?

A.He could not see with his eyes.

B.He became a spider.

C.He developed spider-like powers.

D.He was sick.小题3:What does“with great power,there must also come great responsibility”mean?

A.Powerful people can do whatever they like.

B.People with power are always good.

C.Powerful people should have a responsibility to do good.

D.Powerful people are to blame for all the bad things that happen.小题4:In what areas does Peter have problems that are similar to normal people?

A.Money,time,studying,reading.

B.Money,work,time,relationships.

C.Relationships,sport,money,work.

D.Money,work,time,sleep.

单项选择题