--What are you going to do this Sunday?
--___________. What about you?
--___________. What about you?
| A.I’m OK | B.I’m sorry | C.I’ve no idea | D.What a pity |
You have often __1__ people talk about work. Perhaps you have __2__ your friends about how hard you worked to get something done. However, you may have done no work __3_ you think you worked hard.
A boy is pushing a big box very hard, but the box is __4__ heavy for him to move and he may __5__ to push against the box. __6__ the language of science, he has not done __7__ work. Can you think you are working when you are studying or talking?
In science, work is only done when a force(力) moves something that has weight through a distance(距离).
Work =" force" × distance moved.
__8_ you want to find out whether work is done, _9_ yourself, “Is a push or a pull moving something through a distance?” If your answer is __10_, then work is being done.
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| Summer Surfing USA 15-Day Tour for Beach Lovers | Winter Wonderland 15-Day Ski Tour in the Green Mountains Go skiing in Vermont |
| Visit beautiful Southern California surfing beaches Accommodations(住宿): Single or double rooms in beachfront hotels Price includes: Money for daily surfboard(冲浪板 );3-hour beginner’s lessons Night activities: Beach barbecues(烧烤),club dancing, moonlight boating Other activities: Visit Disneyland, tour Beverly Hills and see the movie stars’ homes Tour cost: Single room $1,999 Double room $2,300 | Accommodation: Village hotels, with relaxing environment and fine Dining, comfortable rooms with nice furniture(家具) Price includes: All ski equipment(装备), life tickets, and daily 2-hour lessons Night activities: Parties in the open air, rock Music concerts Other activities: Shopping, ice skating, cross-country skiing Tour cost: Single room: $2,500 Double room $3,200 |
| A.Visit Disneyland | B.Skate on the ice. |
| C.Enjoy rock music | D.See the movie stars’ homes |
| A.Vermont | B.Green Mountains |
| C.Northern California | D.Southern California |
| A.Lessons | B.Lift tickets | C.Daily surfboard | D.Ski equipment |
The scientists from the Lockheed Space Company (公司) work in Felton, California, with the help of a computer. But the computer is placed in Sunnyside, about 80 kilometers away. What the scientists input is sent by telephone lines to the computer, and after a time, copies of the designs are needed back in Felton as possible. Lockheed people have tried several ways of sending the prints (印刷品), but the most effective seems to be by pigeon (鸽子). Are pigeons really used to carry messages in these days? They are, and they send the prints faster and cheaper than any other way.
Human (人类的) messengers (persons carrying messages) are much more expensive and slower than the pigeons. The road to Felton goes through the mountains, and the driving is not easy. An electronic printout system(电子印刷系统) could do the work in Felton, but at a cost of 10 dollars a print. Pigeons carry the designs for about 1 dollar each.
Now Lockheed people have ten pigeon messengers. The pigeons do the work, and they have made Lockheed more famous. You can often read the news about the pigeons in the newspapers around the world.
【小题1】The story is mainly about .
| A.Felton, California | B.the scientists |
| C.how to work with computers | D.sending prints by pigeon |
| A.don’t like carrying things |
| B.are often cheap to keep |
| C.seem out of place in the space age |
| D.aren’t friendly to the scientists |
| A.usually costs more |
| B.is something that works |
| C.is often unhappy |
| D.is often don by animals |
| A.Pigeons were used as messengers. |
| B.Human messengers were used. |
| C.What the scientists input was sent to the computer. |
| D.Scientists got their designs. |
| A.do the work at low cost |
| B.get their pictures on television |
| C.understand the computer |
| D.make the scientists pleased |
They arrived ______ London ______ the morning of July 1.
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| A.in , in | B.in , on | C.on , in | D.at , on |