快速導航
學歷類
職業資格
公務員
醫衛類
建筑工程
外語類
外貿類
計算機類
財會類
技能鑒定
Without transportation, there could be no trade. Without trade, there could be no towns and cities. Towns and cities are traditionally the ___16___ of civilization. Therefore, transportation helps make civilization ___17___ .
Throughout most of the prehistoric period, people lived by hunting, fishing, and ___18___ wild plants. They had no beasts of burden, wheeled vehicles, or roads. People traveled ___19___ and carried their infants and belongings strapped to their backs or heads. Loads too heavy for one person to carry were strapped to a pole and carried by two people.
___20___ , people learned that they could drag loads along the ground on sledges. During late prehistoric times, people began to build sledges with runners. When people developed agriculture and began to establish ___21___ settlements, trade between settlements
started to develop, which created a need for better ___22___ of transportation. The donkey and the ox, which had been tamed for food products and farm work, helped ___23___ this need. The use of donkeys and oxen as beasts of burden enabled people to ___24___ heavier loads than they could before.
People also began to develop water transportation during prehistoric times. They built rafts of such __25____ as logs or reeds. Later, people learned ___26___ to make dugouts and canoes. People paddled these early craft with their hands
or propelled them with paddles or __27____.
The wheel was invented about 3500 B.C. and sailboat about 3200 B.C. Wheeled vehicles and sailing vessels ___28___transportation. But the speed of transportation improved only ___29___ over the centuries. Inventors produced the first engine- ___30___ vehicles during the late 1700’ s and the early 1800’ s. This development marked the beginning of a revolution in transportation that has continued to the present.
16. A. highlights B. pinpoints C. headquarters D. centers
17. A. possible B. acceptable C. practical D. typical
18. A. growing B. gathering C. watering D. moving
19. A. in turn B. at ease C. on foot D. for fun
20. A. All the while B. For a while C. In time D. On time
21. A. temporary B. permanent C. regular D. steady
22 A. knowledge B. judgment C. standards D. means
23. A. recognize B. develop C. meet D. reduce
24. A. bear B. move C. share D. lift
25. A. materials B. styles C. items D. types
26. A. where B. when C. how D. as
27. A. poles B. sails C. currents D. winds
28. A. demonstrated B. revolutionized C. witnessed D. initiated
29. A. considerably B. continuously C. swiftly D. slightly
30. A. powered B. controlled C. oriented D. related
試題分類：
自考專業(計算機網絡)
練習次數：0次
試題分類：
自考專業(漢語言文學)
練習次數：1次
試題分類：
自考專業(計算機信息管理)
練習次數：0次
試題分類：
自考專業(計算機應用)
練習次數：0次
試題分類：
自考專業(漢語言文學)
練習次數：3次
主站蜘蛛池模板：
国产成人av一区二区三区在线|
亚欧乱色国产精品免费|
欧美巨大xxxx做受中文字幕|
波多野结衣初尝黑人巨大|
精品无码久久久久国产动漫3d|
性欧美暴力猛交69hd|
国产黄a三级三级三级|
丰满人妻一区二区三区无码av|
亚洲国产成人久久一区久久|
免费观看四虎精品国产地址|
亚洲精品国产高清一线久久|
国产看黄网站又黄又爽又色|
浴室人妻的情欲hd三级|
亚洲精品一区二区三区四区乱码|
中文有码无码人妻在线短视频|
久久中文精品无码中文字幕|
国产欧美日韩精品专区|
久久九九兔免费精品6|
九色九九九老阿姨|
苍井空浴缸大战猛男120分钟|
亚洲精品字幕|
亚洲国产精彩中文乱码av|
日韩精品无码人妻一区二区三区|
一道久在线无码加勒比|
中文字幕精品亚洲无线码一区应用|
色婷婷亚洲婷婷八月中文字幕|
狠痕鲁狠狠爱2021在|
精品无码国产一区二区三区51安|
歪歪爽蜜臀av久久精品人人|
中文字幕亚洲综合久久综合|
丝袜无码一区二区三区|
麻豆av一区二区天美传媒|
精品国产人妻一区二区三区免费|
日韩人妻不卡一区二区三区|
亚洲自偷自拍另类12p|
亚洲vs日韩vs欧美vs久久|
亚洲精品卡2卡3卡4卡5卡区|
在线麻豆精东9制片厂av影现网|
av在线中文字幕不卡电影网|
亚洲高清无码视频网站在线|
中文字幕在线日亚洲9|
