A．由同种元素组成B.由不同物质组成C.由两种元素组成，其中一种是氧元素D.有一种物质组成E.分子中含有不同种元素的原子

    Mr. Jackson was tired of living in his old house in the countryside and wanted to sell it and buy a better one. He tried to sell it for a long time, but was not successful, so at last he decided to go to an estate agent（房产经纪人）.

    The agent advertised the house straight away, and a few days later, the owner saw a very beautiful photograph of his house, with a wonderful description of his garden in an expensive magazine.

    Having read the advertisement through, the house owner hurried to phone the estate agent, saying, “I'm sorry, Mr. Jones, but I've decided not to sell my house after all.” “Why?” the agent asked in a surprised voice. “Because from the advertisement in that magazine I can see it's just the kind of house I've wanted to live in all my life.”

如图所示，置于桌面上的甲、乙两容器质量相等，底面积相等，注入等质量的同种液体，则液体对容器底部的压力____，液体对容器底部的压强____，容器对桌面的压强____，容器对桌面的压力____。