人民警察要树立群众意识，做到“权为民所用，情为民所系，利为民所谋”。( )
参考答案：对
水稻在生长过程中，叶片发黄，是因为水稻缺少含哪种元素的无机盐（ ）
A．钾
B．磷
C．氮
D．硼
— Now the air in our city is _____ than it used to be.
— I agree. I think something must be done to stop it.[ ]
A. much better
B. even worse
C. very good
D. rather bad
