题目

在图中，根据给出的反射光线OB画出入射光线AO，并标出入射角的大小。（_____） 答案：【答案】【解析】根据反射定律：反射光线、入射光线和法线在同一平面内，反射光线、入射光线分居法线两侧，反射角等于入射角，作出入射光线并标出入射角及其度数．由图知,反射角为,可得入射角也为,在法线左侧画出入射光线,度数等于反射角为即可，如图所示：动词填空：（每小题1分，共6分）小题1:Anyone who is able ______ (answer) the question may put up his hand.小题2:You must make him ______ (stop) that noise.小题3:The teacher won't let Tom go until he ______ (finish) cleaning the classroom.小题4:Mother ______  (leave) New York for two years.小题5:I will as much as I can ______ (help) you.小题6:There was a man ______ (sit) there with a book in his hand.