在调节好的托盘天平的左右两个托盘中，分别放两个体积相同的实心物体A和B，天平失去了平衡，指针向左偏，比较A和B的密度（  ）

B

    Alice Brown lives in New York with her mum and dad and her two brothers, Tony and Peter. The family has got two dogs, a cat and four rabbits. Alice likes cats and rabbits but her brothers like dogs. Alice's dad works in a hotel. He's a hotel manager. Her mum teaches English at a Junior High School.

    Alice and her brothers study at the same school, but they are in different grades. She's in Grade Seven. Her brother Tony is in Grade Ten and Peter is in Grade Six. They live in a house near the school. They go to school on foot every day.

    Alice is interested in computers. At home she plays computer games in her free time.

阅读下面的宋诗，完成后面1-2题。

登飞来峰

王安石

飞来山上千寻塔，闻说鸡鸣见日升。

不畏浮云遮望眼，自缘身在最高层。