离心泵中的液体为什么会汽化？

“Who has more questions, a teacher or a student?”About this question a great learned man told his students that nobody does but a teacher.

The students got puzzled. With a smile, the teacher drew the circles.“Within the larger one is my knowledge of things and within the smaller one is yours. Out of the circles is still unknown to both of us. Since mine is larger, as you can see, the line that marks out the circle is longer. That makes it clear that who has more chances to face something still unknown.”

小题1:The great learned man believed that          .

A．a teacher has more questions

B．a student has more questions

C．a teacher has no questions

D．a student has no questions小题2:The students thought that            

A．a student has fewer questions than his teacher

B．a teacher has more questions than a student

C．those who have less knowledge have more questions

D．those who have more knowledge have more questions小题3:At the end of the story, the greatest learned man made a conclusion that     .

A．a student should learn more from his teacher

B．a teacher should not have many question

C．a student knows much more than his teacher

D．a teacher has more chances to face unknown knowledge小题4:Which of the following titles is NOT suitable for the story?

A．You will Never Learn English

B．A Teacher and His Student

C．There Is No Limit to Knowledge

D．One Is Never Too Old to Learn小题5:We can often find such an article in        .

A．a guidebook to a museum

B．any kind of books

C．a newspaper or a magazine

D．an encyclopedia(百科全书)

“三过家门而不入”，历经十年，终于制服洪水的是[ ]

A、尧

B、舜

C、禹

D、汤

工程物资主要包括( )。

A．成品

B．建筑材料

C．半成品

D．构配件

E．建筑图纸

羊水栓塞的临床经过包括

A．胎儿窘迫

B．HELLP综合征

C．休克

D．DIC

E．急性肾功能衰竭

影响心功能的几种生理因素是

A．收缩性

B．心率

C．前负荷

D．后负荷

E．氧耗量