如图所示，画中人出现了错误判断．以下四幅光路图中，能正确说明产生这一现象原因的是（  ）

Happy birthday to you.

如图所示，置于水平桌面上的弹簧秤，左端通过细线与固定木板相连，右端用细线经定滑轮悬挂着一质量为0.4kg的物块，则弹簧秤示数和其所受合力大小分别为（   ）

阅读短文，判断下列句子是否符合短文内容，符合的写正确，不符合的写错误。

     Jim lives in a city with his wife. He is a police officer. He works in a police. It is not far from his home, so he goes to work on foot every day. His wife is a worker, she works in a factory. It's far from her home, she goes to work by car. When she drives the car, she is very careful. When the light is red, she stops. When the light is yellow, she waits. She won't go until the light is green. She always says that we must obey (遵守)the traffic rules.