阅读下列短文，根据短文内容，从短文后各题所给的A、B、C、 D四个选项中，选择最佳选项。

How to Be a Better Student

    Maybe you are a common student. You probably think you will never be a top student. This is not necessary so, however. Anyone can become a better student if he or she wants to. Here's how:

Plan your time carefully. When you plan your week, you should make a list of things that you have to do. After making this list, you should make a schedule of your time. First set your time for eating, sleeping, dressing, etc. Then decide a good, regular time for studying. Don't forget to set aside enough time for entertainment. A weekly schedule may not solve all your problems, but it will force you to realize what is happening to your time.

    Find a good place to study. Look around the house for a good study area. Keep this space, which may be a desk or simply a corner of your room, free of everything but study materials. No games, radios, or television! When you sit down to study, concentrate on the subject.

    Make good use of your time in class. Take advantage of class time to listen to everything the teachers say. Really listening in class means less work later. Taking notes will help you remember what the teacher says.

    Study regularly. When you get home from school, go over your notes, review the important points that your teacher is going to discuss the next day, read that material. This will help you understand the next class. If you do these things regularly, the material will become more meaningful, and you will remember it longer.

    Develop a good attitude about tests. The purpose of a test is to show what you have learned about a subject. They help you remember your new knowledge. The world won't end if you don't pass a test, so don't be over worried.

    There are other methods that might help you with your studying. You will probably discover them after you have tried these. 

已知服从正态分布$N\left(\mu ,{\sigma }^2\right)$的随机变量，在区间$\left(\mu -\sigma ,\mu +\sigma \right)$,$\left(\mu -2\sigma ,\mu +2\sigma \right)$和$\left(\mu -3\sigma ,\mu +3\sigma \right)$内取值的概率分别为68.3%，95.4%和99.7%．某大型国有企业为10000名员工定制工作服，设员工的身高（单位：cm）服从正态分布$N\left(173,5^2\right)$，则适合身高在163~183cm范围内员工穿的服装大约要定制（     ）

    An American in Beijing lives his Chinese dream

    Gao Tianrui walks along streets in Beijing's Xicheng district as____public security volunteer.____ (wear) his bright red armband (红袖章) and speaking fluent Mandarin, 62-year-old Gao Tianrui could ____(take) for any regular Chinese man. But on ____(close) inspection, things are not quite____they seem: Gao's real name is Terry Crossman and he is from the United States. He is now a member of “Xicheng Dama”, that is, volunteers, usually women in late middle-age,____walk along the streets of downtown Beijing's Xicheng district. Terry said that, at first, he saw the group as busybodies, but ____(gradual) he saw that it was a good thing for retired seniors____(help) others.

    He is often seen giving tourists____(direction), getting water for a baby and even helping a neighbor sell yogurt. “I like helping others,” he said, “I live in the hutong and my neighbors and I usually help each other ... This is where I live, where my friends are and where I call home.” Crossman ____(become) interested in Chinese culture as a teenager when he read Tao Te Ching by Laozi.

材料一：随着居民收入的稳步增长、互联网的迅速普及和电子商务的不断发展，网络购物作为一种新兴购物方式，以其产品多样、价格低廉、方便快捷等特点，成为越来越多的消费者尤其是年轻消费者生活中不可缺少的部分。

材料二：“微信”，堪称中国当今最火热的移动互联网应用。作为微信之父的张小龙因其独特的个人极简主义风格，对微信提出了即便功能很复杂，也要以最简单的方式呈现出来的精准定位； 并基于消费人群的需求性，率先发布iPhone版，随后发布Android版和Symbian版。而微信向腾讯申请直接将QQ邮箱团队的大批研发人员和阅读空间项目组移师微信的研发团队，使功能得以不断升级；同时注重产品口碑，旨在为客户提供更好的服务。微信衍生的微公益也正在用最舒服的方式改变社会的公益板块构成，为社会贡献自己的爱心。