问题 填空题

如图是物质A和B在不同温度时的溶解度及其溶解度曲线

温度/℃2030506080
溶解度/gA110114121126139
B31.645.885.5110169
回答下列问题:

(1)图中表示B物质溶解度曲线的是     (填“甲”或“乙”).

(2)曲线上M点的含义是                               

(3)温度t1介于                 ℃之间.

答案

(1)甲;(2)t1℃时,A、B两物质的溶解度相等; (3)60﹣80

 

题目分析:(1)图中表示B物质溶解度曲线的是甲,因为B的溶解度受温度的变化比较大,故答案为:甲;(2)曲线上M点的含义是:t1℃时,A、B两物质的溶解度相等;(3)温度t1介于60﹣80℃之间,A和B的溶解度才会有交点,故答案为:60﹣80

单项选择题
阅读理解

阅读理解。

     I first went to Harrow in the summer term. The school had the biggest swimming pool I had ever seen.

It was a good joke to come up behind a naked boy, and push him into the pool. I made quite a habit of this

with boys of my own size or less.

     One day I saw a boy wrapped in a towel on the side of the pool. He was no bigger than I was, so I

thought him a fair game. Coming secretly behind, I pushed him in, holding on to his towel so that it would

not get wet, I was surprised to see an angry face come out from the water, and a being of great strength

masking its way by face strokes (猛力地划) to the shore. I fled, but in vain. He overtook me, seized me

violently, and threw me into the deepest part of the pool. I soon climbed out on the other side, and found

myself surrounded by a crowd of younger boys. "Do you know what you have done?" they said, "It's

Amery; he is in Grade Six. He is champion at gym, he has got his football honor."

     I was frightened and felt ashamed. How could I tell his position when be was wrapped in a bath towel

and so small. "He didn't seem pleased at all, so I added in a most brilliant word," My father, who is a great

man, is also small." At this be laughed, and after some general words about my rude behavior and how I had

better be careful in the future, signified the incident was closed.

1. The writer thought Amery "a fair game" because the boy _____.

A. looked like an animal B. was fond of games C. was of similar size D. was good at sports

2. The writer felt "ashamed" because _____.

A. he was laughed at by other boys

B. Amery turned out to be in the same grade

C. he pushed Amery hard and hurt him

D. he played a joke on an outstanding athlete

3. By saying "My father, who is a great man, is also small", the write _____.

A. tried to please Amery

B. challenged Amery

C. threatened Amery

D. admired his father

4. Which of the following is TRUE?

A. The writer could run faster than Amery.

B. The writer liked playing on boys of all sizes.

C. Amery was a student in Grade Four.

D. Amery forgave the writer for his rude behavior.