地球上的陆地主要集中在[ ]
A、南半球和北半球
B、南半球和东半球
C、南半球和西半球
D、北半球和东半球
答案：D
In order to keep healthy, you should eat _____ fast food and _____ fresh vegetables, and take enough exercise. [ ]
A. fewer; fewer
B. less; more
C. fewer; more
D. less; less
地铁变电所35KV气体绝缘开关柜的断路器机构的操作机构是（）。
