问题 单项选择题 A1型题

新生儿肾小球滤过率低的原因,下列说法正确的是()

A.近髓质肾小球发育不良

B.出球小动脉阻力低

C.肾小球毛细血管通透性高

D.心排血量低,肾血流量少

E.肾小球毛细血管内压高

答案

参考答案:D

解析:新生儿肾小球滤过率低与以下因素有关:近皮质肾小球发育不良,滤过作用主要由近髓质肾小球负担,且其入球小动脉间有吻合支而有血流短路,致滤过量减少;入球小动脉阻力和出球小动脉阻力高;心排血量低,肾血流量少;滤过面积小等。

单项选择题
阅读理解

Robots are smart. With their computer brains, they help people work in dangerous places or do difficult jobs. Some robots do regular jobs. Bobby, the robot mail carrier, brings mail to a large office building in Washington, D.C. He is one of 250 robot mail carriers in the United States. Mr. Leachim, who weights two hundred pounds and is six feet tall, has some advantages as a teacher. One is that he does not forget details. He knows each child’s name, their parents’ names, and what each child knows and needs to know. In addition, he knows each child’s pets and hobbies. Mr. Leachim does not make mistakes. Each child goes and tells him his or her name, then dials an identification (识别) number. His computer brain puts the child’s voice and number together. He identifies the child with no mistakes.

Another advantage is that Mr. Leachim is flexible. If the children need more time to do their lessons they can move switches. In this way they can repeat Mr. Leachim’s lesson over and over again. When the children do a good job, he tells them something interesting about their hobbies. At the end of the lesson the children switch Mr. Leachim off.

小题1:The first paragraph of the passage tells us

A.human beings are not as smart as robots

B.robots will take the place of man to rule the earth

C.we can only use robots to do some regular jobs

D.robots can help people in many different ways小题2:What is the most important thing Mr. Leachim can do in his lessons?

A.To meet the needs of each student.

B.To talk to the students in different languages.

C.To keep everyone’s interest in his lessons.

D.To introduce more hobbies to the children.小题3:The underlined word “flexible” probably means

A.not strict

B.not hard

C.suitable

D.changeable小题4:Which of the following statements may be TRUE according to the passage?

A. There are 250 robot teachers in the United States.

B. Mr. Leachim is run and controlled by electricity.

C. Bobby works in a large office building in Washington D.C.

D. The lessons taught by Mr. Leachim are given on a TV set.