题目

Sophie was a ten-year-old girl. She loved   21  . She drew before breakfast. She drew after breakfast. Sometimes she even drew on her way to   22.        One day Sophie arrived   23   at school. “Why are you late, Sophie?” asked her   24   .        “I’m sorry, Miss. I was drawing a big house on the way to school. I forgot about the   25  ”        “Oh, Sophie,” said her teacher. “You must think  26  about your drawing and more about school. Can you give me your   27   now please?”        “I’m sorry, Miss, I don’t ha用同一光电管研究a、b两种单色光产生的光电效应，得到光电流I与光电管两极间所加电压U的关系如图．则这两种光（　　）A．照射该光电管时a光使其逸出的光电子最大初动能大B．从同种玻璃射入空气发生全反射时，a光的临界角大C．通过同一装置发生双缝干涉，a光的相邻条纹间距大D．通过同一玻璃三棱镜时，a光的偏折程度大