大气中二氧化碳含量的逐年上升会导致什么现象（）
A、雨岛效应
B、热岛效应
C、温室效应
D、臭氧层空洞
参考答案：C
适度消费就是抑制消费，鼓励消费就是高消费。 [ ]
Miss Li _____ as a secretary for five years in the company, and now she is general manager of it.[ ]
A. has served
B. had served
C. served
D. serves
