题目

二．完形填空：(20×1.5=30分) A Blind Boy A blind boy sat on the steps of a building with a hat by his feet. He held up a __21__ which said: “I am blind, please help.” There were only a few _22_  in the hat. A man was walking by. He took a few coins from his _ 23___ and dropped them into the hat. He _24__ took the sign, turned it around and wrote some words. He __25__ the sign __26__ everyone who walked by would see the new words. Soon the hat began to __27_. A lot more people were giving money to the blind boy. That afternoon the man who had __28__ the sign came to see __29_ thin在膝跳反射的反射弧中，效应器是指 A．肌肉       B．传出神经末梢      C．腺体       D．传出神经末梢和它所支配的肌肉