A：我们的祖国山河壮丽，文学家以脍炙人口的诗句吟咏它，绘画家以使人迷恋的丹青描绘它，摄影师以令人神往的镜头记录它。
B：一个很大很大的困难，除以13亿，就会变得微不足道；一个很小很小的爱心，乘以13亿，就会聚成爱的海洋。
C：部分西方媒体别出心裁地剪接西藏“3 ·14 ”事件的图片，歪曲报道事实真相。
D：“全国亿万学生阳光体育运动”实施以来，各级各类学校因地制宜，开展形式多样的体育活动，促进了学生的全面发展。
2013年中央“一号文件”指出,各地要大力扶持和培育专业大户、家庭农场等新型生产经营主体。家庭农场以家庭成员为主要劳动力,实行规模化、集约化、商品化生产经营,不断促进农业增效。这有利于（ ）。
①发展农村经济,增加农民收入
②解决分配不公,实现社会的和谐
③优化资源配置,促进农业发展
④转变经营方式,完善所有制结构
How did we help to save our earth this week? Let me tell you. First, my family tried to save electrcity (电). We never left the lights1 when leaving the room. We 2the TV when nobody was watching it. Mum only used cold water in the washing machine. Second, we started recycling (回收) this week. We tried to write on 3 of our paper, no just on one side. We also divided our rubbish into 4 bags for bottles, paper and food. Mum kept the plastic shopping bags from the supermarket to use them again as rubbish bags. Third, my family started to save 5 .We stopped 6long baths and had short showers (淋浴) 7. We washed toilet with used water. Mum and dad used less water to do the washing. My sister and I didn’t leave the tap (龙头) running when we brushed our teeth. At last, mum and dad began to save gas (汽油). Mum used to 8 us to school, but now my sister and I started riding our bikes to school. It's hard work 9 good exercise! This week dad and a few of the people in his company also started to go to work in one car and share the 10. These are great ways to help protect our environment.
已知向量a→=2,3,b→=-1,2，若ma→+4b→与a→-2b→共线，则 ( )
