问题 多选题
恒温的水池中,有一气泡缓慢上升,在此过程中,气泡的体积会逐渐增大,不考虑气泡内气体分子势能的变化,则下列说法中正确的是(   )

A.气泡内的气体对外界做功

B.气泡内的气体内能增加

C.气泡内的气体与外界没有热传递

D.气泡内气体分子的平均动能保持不变

答案

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     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 become ministers or teachers.

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

Later lawyers could receive their training 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 interests them.

    Today. There are many different kinds of colleges and universities. Most of them are made

up of smaller schools that deal with 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. Yale  

B. Harvard  

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 and Greek, 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. law and something about medicine

C. many new subjects

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. how colleges have changed

D. what kind of lessons each college teaches