B

    It's 14:00. The house is quiet(安静的). "Tom?" Mom says. No one answers.

    Mom comes to Tom's house. He is not in the bed. But his model plane is on the desk. "He is not in his room, and he is not in the yard(院子)," Mom thinks. Then Mom comes to his grandparents' room. Tom likes to play with Grandpa's tape player. But he is not there.

    Mom looks for(寻找) him everywhere. But where is Tom? Mom is worried. She wants to call Dad. She comes to the living room to get the phone.

    "What's that?" Mom sees something(某物) black under the sofa. Oh, it's Paul, Tom's dog. It loves sleeping(睡觉) there. But what is next to Paul? It's Tom!

南宋杭州富阳县“重于粪桑，轻于壅田”，称“备田不耕，一枝桑必争护”。粮食生产“仅支半岁，半岁所食，悉仰商贩”。由此可知（     ）

由湖南地图出版社与湖北省测绘学会共同编制的竖版《世界知识地图》是对传统横版《世界地图》的一种突破，这意味着使用了400多年的横版地图不再“一统天下”，在地图制图领域具有划时代的意义。换个角度看世界，根据如图，回答以下问题。