题干
---How often do you eat out?
---______, but usually once a week.
---______, but usually once a week.
A：Have no idea
B：As usual
C：It depend
D：Generally speaking
答案(点此获取答案解析）
C
E（g）；当反应进行到4min时达到平衡，测知M的浓度为0.2mol·L—1。下列说法正确的是
