Today it is found that school students hardly pay much attention to sports. Is it because they aren't interested in sports? No. They often say they have other more important things to do.

    What are these important things? Examinations! Students have to spend much time on all kinds of examinations at school. So many of them almost become bookworms (书呆子). Books stop them from doing sports. Because of the pressure from their parents and teachers, the students have to work harder and spend most of their time on books. As for (就……而言) the students, they want to get good results so that they can improve their studies. So it is necessary（必要） for them to give all of their free time to their studies and stop their school sports.

    In fact, education can't go without physical (身体的) exercises, because a quick mind hardly goes along with a weak body. If you don't have a strong body, you can never get anything, let alone (更不用说) a great success in your life.

已知向量$\overrightarrow{a}$=（$\sqrt{3}$，1），$\overrightarrow{b}$=（m，1）．若向量$\overrightarrow{a}$，$\overrightarrow{b}$的夹角为$\frac{2\mathrm{\pi }}{3}$，则实数m=（　　）

已知双曲线$\Gamma$：$\frac{x^2}{a^2}-\frac{y^2}{b^2}=1\left(a>0,b>0\right)$的离心率e=2，过双曲线$\Gamma$的左焦点F作$○O$：$x^2+y^2=a^2$的两条切线，切点分别为A、B，则$\angle AFB$的大小等于（    ）

综合性学习。完成1-6题。

学校开展诗词诵读活动，参加这项活动的有知名的研究***诗词的专家，听说他不仅要朗诵***的《沁园春·雪》，还要请同学们回答问题。如果他问你下面这些问题，你怎样回答？

北国风光，千里冰封，万里雪飘。

　　望长城内外，惟余莽莽；

　　大河上下，顿失滔滔。

　　山舞银蛇，原驰蜡象，欲与天公试比高。

　　须晴日，看红装素裹，分外妖娆。

　　江山如此多娇，引无数英雄竞折腰。

　　惜秦皇汉武，略输文采；

　　唐宗宋祖，稍逊风骚。

　　一代天骄，成吉思汗，只识弯弓射大雕。

　　俱往矣，数风流人物，还看今朝。