问题
问答题 简答题
何谓反射?举例说明其生理意义?
答案
参考答案:
反射是指在中枢神经系统参与下机体对内、外环境变化所作出的规律性应答,可分为非条件反射和条件反射。非条件反射(生来就有)能使机体初步适应环境,对个体生存与种系生存有重要意义。条件反射(生后训练而成)使机体具有更大的灵活性,更适应复杂变化的生存环境。
何谓反射?举例说明其生理意义?
参考答案:
反射是指在中枢神经系统参与下机体对内、外环境变化所作出的规律性应答,可分为非条件反射和条件反射。非条件反射(生来就有)能使机体初步适应环境,对个体生存与种系生存有重要意义。条件反射(生后训练而成)使机体具有更大的灵活性,更适应复杂变化的生存环境。
完形填空。 | |||
Hello, my name is Frank. I__1__ sports very much. I play __2__ baseball with __3__ friends every day. I have __4__ ping-pong balls. They __5__ under my bed. And I have six __6__. My uncle is Bob. He __7__ sports, too. He __8__ fifteen basketballs and six soccer balls. But he __9__ play sports every day. He only __10__ them on TV. | |||
( ) 1. A, likes ( ) 2. A. a ( ) 3. A. I ( ) 4. A. lot of ( ) 5. A. is ( ) 6. A. baseball ( ) 7. A. like ( ) 8. A. have ( ) 9. A. don't ( ) 10. A. looks | B. like B. / B. me B. alot B. are B. basketball B. liking B. haves B. doesn't B. watching | C. liking C. an C. my C. lots of C. am C. baseballs C. likes C. has C. isn't C. watch | D. am D. the D. she D. alots of D. be D. ping-pong D. is D. are D. aren't D. watches |