“发展节水高效特色作物种植，不断加快推进沙葱、黑果枸杞等珍品级的沙地作物走向节水高效、规模化种植、产业化发展。”内蒙古阿拉善盟通过壮大沙生植物产业，实现了生态保护治理和促进富民兴业双赢的绿色发展。上述材料说明（    ）

①客观规律制约着人们主观能动性的发挥

②人们可以通过实践建立人为事物的联系

③人们可以认识和利用规律，为人类造福

④通过改变事物的固有联系，推动事物发展

如图一束光从空气斜射入平行玻璃砖（入射角为50°）后，再折射入空气．

（1）图甲、乙两图中，符合光的折射规律的是图____ （选填“甲”或“乙”）；

（2）光从玻璃斜射入空气中的折射角____ 50°（选填“大于”、“小于”或“等于”）．

先通读下面的短文，掌握其大意，然后从A、B、C、D四个选项中选择可以填入空白处的最佳答案．

Dear Tony,

    I'm glad to1you．Now let me tell you something about my2life．I was born in3village．It was not big but4was beautiful and clean．There5a big garden．Near the garden was my first school，6I walked to school.My first teacher was7 and nice,but she was also8us.My best friends are Wang Mai and Li Dong.Wang Mai was good at all9and he was the top pupil(尖子学生)．Li Dong was good at football and he was a member of our school football team．

    I am looking forward to going back to my school and 10 my teachers and friends．

Yours，

Du Ming