单选题
The first thing to notice is that the media we're all familiar with—from books to television are one-way propositions: they push their content at us. The Web is two-way, push and pull. In finer point, it combines the one-way reach of broadcast with the two-way reciprocity (互惠) of a mid-cast. Indeed, its user can at once be a receiver and sender of broadcast—a confusing property, but mind-stretching! A second aspect of the Web is that it is the first medium that honors the notion of multiple intelligences. This past century's concept of literacy grew out of our intense belief in text, a focus enhanced by the power of one particular technology—the typewriter. It became a great tool for writers but a terrible one for other creative activities such as sketching, painting, notating music, or even mathematics. The typewriter prized one particular kind of intelligence, but with the Web, we suddenly have a medium that honors multiple forms of intelligence—abstract, textual, visual, musical, social, and kinesthetic. As educators, we now have a chance to construct a medium that enables all young people to become engaged in their ideal way of learning. The Web affords the match we need between a medium and how a particular person learns. A third and unusual aspect of the Web is that it leverages (起杠杆作用) the small efforts of the many with the large efforts of the few. For example, researchers in the Maricopa County Community College system in Phoenix have found a way to link a set of senior citizens with pupils in the Longview Elementary School, as helper-mentors (顾问). It's wonderful to see kids listen to these grandparents better than they do to their own parents, the mentoring really helps their teachers, and the seniors create a sense of meaning for themselves. Thus, the small efforts of the many—the seniors—complement the large efforts of the few—the teachers. The same thing can be found in operation at Hewlett-Pack- ard, where engineers use the Web to help kids with science or math problems. Both of these examples barely scratch the surface as we think about what's possible when we start interlacing resources with needs across a whole region.
单选题
What does the word "mind-stretching" imply?
【正确答案】
C
【答案解析】[解析] 本题属于推论题。在解答本题前应先找到mind-stretching所在的句子，即“Incteed， its user can at once be a receiver and seilder of broadcast—a confusing property，but mind-stretching!(在网络上人们可以是信息接受者也可以是发布者，这很让人有点迷惑，但是却对人的思维有很高要求。)”因此C项为正确答案。
单选题
What is a terrible tool for activities such as sketching and painting?
【正确答案】
B
【答案解析】[解析] 根据第二段第三行“It became a great tool for writers but a terrible one for other creative activities such as sketching，painting，notating music，or even mathematics”可知，对作家来说是有利的工具，但对其他创造性的活动则是不利的工具，这个工具可以从该句的上文中找到，是the typewriter，因此B项正确。
单选题
Which group of people make some efforts to help pupils in elementary schools?
【正确答案】
D
【答案解析】[解析] 是谁努力帮助小学生呢?答案可参照文章的倒数第五行“Thus，the small efforts of the many—the setliors—complement the large efforts of the few—the teachers”。再结合上文，说的是小学请来年长者作为顾问，所以是年长者努力帮助小学生，故选D项。
单选题
The sentence "the seniors create a sense of meaning for themselves" means the seniors______.
【正确答案】
A
【答案解析】[解析] 在解答本题前应首先理解本题句子的含义。the setaiors create a sellse of meaning for themselves的意思是“这些老人也感觉到了自己的价值”。这句话并没有涉及网络的内容，因此B、C、D三项都不对，只有A项是符合题意的。
单选题
The expression "scratch the surface" most probably means______.
【正确答案】
C
【答案解析】[解析] scratch意为“乱涂，擦，刮，抓，挖出”，词组scratch the surface意为“只接触表面”，C项“处理某事物不全面”跟这个意思相符，因此C项正确。
单选题
The Internet can be depicted as follows except______.