There are  1 days  2 a week. They are  3 , Tuesday, Wednesday, Thursday, Friday, Saturday and4  .Sunday is the first day 5 a week. Monday is the second day of a week. The last day of a week is Saturday.  6  China, people work 7days a week. They go to work from Monday 8  Friday. They don't go to work 9 Saturdays and Sundays . They stay 10  home.

读“我国局部地区图”和有关材料，回答问题。

材料一近年来，图示地区甲、乙两河流域“水多、水少、水脏、水浑”四大问题十分突出，严重制约了地区经济发展。“水多、水少”指旱涝灾害频繁，“水脏、水浑”则与水污染和水土流失密切相关。

材料二据统计，图中A省现有水土流失面积达2.64万平方千米，占该省总面积的19%，主要集中在A省的西部和南部地区。这些地区由于人多地少，毁林开荒和陡坡种植现象较多。据不完全统计，A省现有坡耕地814万亩，其中坡度在25度以上的有178万亩。

下列说法正确的是（  ）