环境空气质量周报各监测项目每周不得少于（）不连续的日均值有效数据。
A、6个
B、5个
C、4个
D、3个
参考答案：D
设a=0.76，b=0.70.7，c=60.7则a，b，c这三个数的大小关系（ ）
A．a＜b＜c
B．c＜b＜a
C．c＜a＜b
D．b＜c＜a
--People should use public transport instead of their own private cars.
--- _______.The roads are too crowded as it is.
A．Eventually
B．Exactly.
C．Particularly
D．Actually.
