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问题 单项选择题

人的基本生命中枢位于（）。

A.延髓

B.脑桥

C.下丘脑

D.丘脑

E.大脑皮层

答案

参考答案：A

解析：许多基本生命现象（如循环、呼吸等）的反射调节在延髓水平已能初步完成。因此，延髓有“生命中枢”之称。

阅读理解

Mrs Green is an English woman. She teaches English. Her English class is very interesting. She likes us and we like her, too. Mrs Green has two children--- Mike and Jane. Mike is seven and his sister Jane is four. Mike goes to school but Jane doesn’t. Mrs Green likes ping—pong. After school we have ping—pong matches. Sometimes Mrs. Green watches and joins us. She plays basketball just for fun.

(  )1. Mrs Green is_________.

A. a Chinese teacher    B. an English man     C. an English teacher     D. a Chinese woman

(  )2. How many daughters does Mrs Green have? 

A .One               B. Two              C. Three               D. No one

(  )3. Jane doesn’t go to school because _______.

A. she looks beautiful    B. she is seven   C. she doesn’t like school    D. she is only four

(  )4. Mrs Green likes ______ very much.

A. baseball        B. football     C. ping—pong    D. basketball

(  )5.The passage( 短文 ) is about (关于 )_________.

A. Mrs. Green’s son     B Mrs. Green         C. Mike and Jane     D. ping—pong game
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填空题

有一个学生关系，其关键字为“学号”，又有一个课程关系，其关键字为“课程号”；另有一个选修关系，其关键字为“学号”和“课程号”的组合，则“学号”和“课程号”分别为该关系的______。
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