题干
——What do you think ofthe air in Jinan?
—— It's always above PM2.5.
A：I think so
B：I can't stand it
C：I don't care
D：I hope so
答案(点此获取答案解析）
B
——What do you think ofthe air in Jinan?
—— It's always above PM2.5.
A：I think so
B：I can't stand it
C：I don't care
D：I hope so
创新是已有知识积累的量变