阅读理解。
Nowadays some people like to buy what they want through the Internet, which really brings us lots of
conveniences. If you have a computer linked with the internet by telephone or another, you can just move
the mouse, fill in some forms about your personal information and the information of the company which
you are buying things from, then the clerk from the company will send what you need to you in a short time.
However, some housewives don't always enjoy that way. They still like to walk around a shop or a
supermarket on one hand, they suspect the reality of the goods on the screen, because they buy the things
online only by eye not by ear or hand even or now; on the other hand, they think it is really a kind of relaxation
to walk around the shop or the supermarket, and sometimes it is an interesting thing to bargain with the
sellers. If they cut down lots of price, they will have a feeling of success.
1. People like to buy things through the Internet because _____. [ ]
A. The goods are at a low price
B. the goods are at a high price
C. it can bring people lots of conveniences
D. the goods are nice
2. People can get what they want through the Internet _____. [ ]
A. very slowly
B. very quickly
C. very expensive
D. very hard
3. The word "convenience" means _____ in Chinese. [ ]
A. 金钱
B. 商品
C. 货物
D. 方便
4. Some housewives enjoy shopping in a shop or a supermarket because _____. [ ]
A. it's a kind of relaxation to walk around a shop or a supermarket
B. it's very interesting to bargain
C. people can get a feeling of success by cutting the price down
D. A, B And C
5. The best title of the passage is _____. [ ]
A. Shopping online
B. How people can go shopping online
C. The convenience of shopping online
D. Women like shopping online
a的加速度向东行驶时，链接某两相邻车厢的挂钩P和Q间的拉力大小仍为F。不计车厢与铁轨间的摩擦，每节车厢质量相同，则这列车厢的节数可能为（）