Two lines can form an infinite number of ______.
A
暂无解析
Hisproposalis_____toallofusandyoudonotneedtotellusmoreaboutit.
Passage 3
Questions 11 to 15 are based on the following passage:
The cowboy is the hero of many movies,. He is, even today, a symbol of courage and adventure. But what was the life of the cowboy really like?
The cowboy’s job is clear from the word cowboy. Cowboy were men who took care of cows and other cattle. The cattle were in the West and in Texas. People in the cities of the East wanted beef these cattle. Trains could take the cattle east. But first the cattle had to get to the trains. Part of the cowboy’s job was to take the cattle hundreds of miles to the railroad town. The trips were called cattle drivers. A cattle drive usually took several months. Cowboys rode for sixteen hours a day. Because they rode so much, each cowboy brought along about eight horses. A cowboy changed horses several times each day.
The cowboys had to make sure that cattle arrived safely. Before starting on a drive, the cowboys branded the cattle. They burned a mark on the cattle to show who they belonged to. But these marks didn’t stop rustlers, or cattle thieves. Cowboys had to protect the cattle from rustlers. Rustlers made the dangerous trip even more dangerous.
Even though their work was very difficult and dangerous, cowboys did not earn much money. They were paid badly. Yet cowboys liked their way of life. They lived in a wild and open country. They lived a life of adventure and freedom.
11. A cowboy is a symbol of .
A. courage and adventure B. a hard life and big pay
C. movies in the past D. cows and other cattle
12. The cowboys’ job was .
A. to be a hero in real life B. to be a hero of the movie
C. to take care of cattle D. to be a dangerous rustler
13. During a cattle driver, cowboys took a group of cows from a wild and open country to .
A. the West states and Texas B. the cities of the East States
C. the people who eat beef in cities D. the railroad towns hundred miles away
14. On their way of cattle drivers, the cowboys protected the cattle by .
A. burning a mark on their cows B. keeping an eye on cattle thieves
C. making the trip more dangerous D. looking after eight cows each person
15. Cowboys enjoyed themselves because .
A. they liked their way of life B. they made a lot of money
C. they had a vary difficult job D. they were heroes in movies
Passage 4
Questions 16 to 20 are based on the following passage:
Successful innovations have driven many older technologies to extinction and have resulted in higher productivity, greater consumption of energy, increased demand of raw materials, accelerated flow of materials through the economy and increased quantities of metals and other substances in use each person. The history of industrial development abounds with examples.
In 1870, horses and mules were the prime source of power on U.S. farms. One horse or mule was required to support four human beings a ratio that remained almost constant for many decades. At that time, had a national commission been asked to forecast the population for 1970, its answer probably would have depended on whether its consultants were of an economic or technological turn of mind. Had they been “economists”, they would probably have projected the 1970 horses or mule population to be more than 50 million. Had they been “technologists”, they would have recognized that the power of steam had already been harnessed to industry and to learn and ocean transport. They would have recognized further that it would be the prime source of power on the farm. It would have been difficult for them to avoid the conclusion that the horse and mule population would decline rapidly.
16. According to the passage, what supplied most of the power on U.S. farms in 1870?
A. Animals B. Humans C. Engines D. Water
17. Which of the following is NOT mentioned by the author as a consequence of new technological developments?
A. Older technologies die away.
B. The quality of life is Improved.
C. Overall productivity increase.
D. More raw materials become necessary.
18. It can be inferred from the passage that by 1870 .
A. technology began to be more economical
B. the steam engine had been invented
C. the U.S. horse population was about 10 million
D. a national commission was about 10 million
19. In the second paragraph, the author suggests that “economists” would .
A. plan the economy through yearly forecasts
B. fail to consider the influence of technological innovation
C. value the economic contribution of farm animals
D. consult the national commission on the economy
20. What is the author’s attitude toward changes brought on by technological innovations?
A. He is excited about them.
B. He accept them as natural.
C. He is disturbed by them.
D. He questions their usefulness.
填写通行证申请表、变更表以及通行证专用介绍信前,必须认真阅读填表须知,严格按要求如实填写,并由本单位()签署申办意见并加盖单位公章。
管线加油车是具有()、过滤净化、()等功能的专用车辆。
根据安全保卫的需要机场控制区划分为()
首次申办控制区通行证人员应携带本人()在办证窗口通过面见审核。
()由中国近代著名教育家、出版家陆费逵动议编纂,至今已有整整100年历史,是我国唯一一部以字代词,集字典、语文词典和百科辞典等功能于一体的大型综合性图书。
常见的金属中,燃料最容易受()催化而氧化变质。
短期和临时通行证有效期满,()应及时回收,统一保存,保存期满三个月后方可销毁。
游艇应当避免在:①船舶定线制水域、②主航道、③锚地、④养殖区、⑤沿海港湾、⑥渡口附近水域以及交通密集区及其他交通管制水域航行,确需进入上述水域航行的,应当听从海事管理机构的指挥,并遵守限速规定;
含有水分杂质的燃油进入过滤分离器后,首先()流过一级滤芯。
非正弦周期信号的表示形式为:()