根据短文理解，回答下列问题。

    The Internet is becoming more and more important in our life. How much do you know about it? What is the Internet? The Internet is a large, worldwide collection of computer networks. A network is a small group of computers put together. The Internet is many different networks from (A)                 the world. These networks are called the Internet. Once you have learned to use the Internet, you can have a lot of interest in the World Wide Web.

    What is the World Wide Web?

    The World Wide Web has been the most popular development of the Internet. The Web is like a big electronic book with millions of pages. These pages are called homepages. You can find information about almost anything in the world on these pages. For example, (B) you can use the Internet instead of a library to find information for your homework. You can also find information about your favourite sports or film stars, talk to your friends or even do some shopping on the Internet. Most pages have words, pictures and even sound or music.

    What is e-mail? (C)电子邮件是给别人发送信息的一种方法。 It's much quicker and cheaper than sending a letter. If you want to send e-mails, you must have an e-mail address. This address must have letters and dots(点 ) and an ‘@’( meaning ‘at'). This is what an address looks like: Emily @ star. net. Write a message, type in the person's e-mail address, and then send the message on the Internet. People don't need to use stamps, envelopes or go to the post office since the invention of the Internet. Quick. easy and interesting--that's the Internet!

沙特阿拉伯的贝都因人，穿着宽大的袍子，过着游牧的生活，主要原因是(    )

做下列运动的物体，能当做质点处理的是（   ）

    Amy Maplethorpe, a first-year speech-language teacher at Raymond Ellis Primary School, used tennis balls, a hot glue gun, Mod Podge and a bit of paint to create two chairs that help students with sensory (感官的) problems.

    According to the school's Facebook page, which became very popular, the chairs provide a “different texture (质地) to improve sensory regulation (调控).”

    Maplethorpe told ABC News that the chairs will service about 15 to 20 students. Children with sensory problems often have a hard time “dealing with sensory information”. Things, such as coats, blankets and Maplethorpe's chairs, often comfort a student.

    Maplethorpe was excited to create the chair after seeing something similar on a website, and she made some changes to the idea.

    “I wanted to continue to help students with sensory problems at Ellis and provide a different kind of seat for the students,” she continued. “I was excited that this chair could help my students.''

    The two chairs are now in the school's sensory room, which was created recently, according to headmaster, Beth Kiewicz.

    “When a child's sensory needs are met, we then can move on to their needs in study,” Kiewicz, who has led the school for six years, told ABC News.

    Maplethorpe said the chairs have already made a difference for some of her students.

    “Students have become more patient, and have followed directions, while waiting for activities,” she said.