下列现象中不属于摩擦起电现象的是（ ）

我国南极考察队由上海出发到我国的南极考察站﹣﹣中山站（69°S，76°E），途经地球五带中的（　　）个．

当你告诉别人，他可以乘自行车去的时候，应该怎样说:

根据短文理解, 从A、B、C、D四个选项中选择正确答案填空。

    Mr. Smith 1 from London. Now he is in China. He is 2. He teaches 3 a middle school. He works very hard. His students like 4 very much. He can 5 a little Chinese. His students often teaches him Chinese 6 Sundays. Mr. Smith likes playing football. He often plays football 7 his students.

    Mr. Smith 8 a son. His name is Jack. He is student. He studies in a middle school. He goes to school 9 bike everyday. He gets back home at four in the afternoon. He likes 10 TV in the evening.

京津唐工业基地是我国北方最大的综合性工业基地，根据相关知识回答下列问题。