题目

What does the woman imply about Uncle Jim?A.He eats too much. B.His manners are just fine. C.He has a good sense of humor. 答案：【答案】C【解析】【原文】M: I wish Uncle Jim wouldn’t talk with his mouth full of food.W: Well, I love his jokes, and that makes up for his lack of manners.用厚度不计的玻璃制成一空气三棱镜，放置于水中，如图所示，一束平行底边ab的单色光线射向侧面ac，并从bc侧面射出，此时，光线将向（　　）A．向底边偏折B．向顶角偏折C．不发生偏折D．与入射光线平行，但不共线