问题 选择题

下列各选项中,解释与事实不吻合的是(  )

选项事实解释
A液氧和氧气都能使带火星的木条复燃同种分子的化学性质相同
B酒精做温度计的填充物酒精分子的体积受热变大,遇冷变小
C金刚石很坚硬,而石墨却很软碳原子的排列不同
D食物变质分子本身发生了变化

A.A

B.B

C.C

D.D

答案

A、液氧和氧气都能使带火星的木条复燃是因为它们是由氧分子构成的,同种物质的分子性质相同,故A解释正确;

B、酒精做温度计的填充物是利用了酒精分子的间隔受热变大,遇冷变小,故B解释错误;

C、金刚石坚硬而石墨质地很软,是由于碳原子的排列方式不同,故C解释正确;

D、食物腐烂变质的过程中有新物质生成,分子本身发生了改变.故D解释正确;

故选B.

问答题
阅读理解

阅读理解。

     Started in 1636, Harvard University is the oldest of all the many colleges and universities in the United

States. Yale, Princeton, Columbia and Dartmouth were opened soon after Harvard.   

     In the early years, these schools were much alike. Only young men went to college. All the students

studied the same subjects, and everyone learned Latin, Greek and Hebrew. Little was known about science

then, and one kind of school could teach everything that was known about the world. When the students

graduated, most of them became ministers or teachers.   

     In 1782, Harvard started a medical school for young men who wanted to become doctors. Later, lawyers

could receive their training (*训练) in Harvard's law school. In 1825, besides Latin and Greek, Harvard began

teaching modern languages, such as French and German. Soon it began teaching American history.   

     As knowledge increased, Harvard and other colleges began to teach many new subjects. Students were

allowed to choose the subjects that interested them.   

     Today, there are many different kinds of colleges and universities. Most of them are made up of smaller

schools that deal with (涉及) special fields of learning. There's so much to learn that one kind of school can't

offer it

all.

1. The oldest university in the US is _______.   

A. Harvard

B. Yale    

C. Princeton    

D. Columbia

2. From the second paragraph, we can see that in the early years,______.   

A. those colleges and universities were the same   

B. people, young or old, might study in the colleges   

C. students studied only some languages and science   

D. when the students finished their school, they became lawyers or teachers

3. Modern languages the Harvard taught in 1825 were ______.   

A. Latin and Greek   

B. Latin, Green, French and German   

C. American history and German   

D. French and German

4. As knowledge increased, colleges began to teach _______.   

A. everything that was known   

B. many new subjects    

C. law and something about medicine   

D. the subjects that interested students

5. On the whole, the passage is about _______.   

A. how to start a university    

B. the world-famous colleges in America   

C. what kind of lesson each college teaches    

D. how colleges have changed