题目内容
在宫殿、坛庙、陵墓的建造上,中国长期形成了一套独有的制度体系,其中反映了古代建筑()。
查看答案
搜索结果不匹配？点我反馈
更多问题
在进行行业分析时,比较分析法是一种较为常用的分析方法。()
A．511B．1021C．4093D．4094
违约责任是以()为前提的。
Transportation use a to Be Much
Slower than It Is Now
For many years in tile desert, camels used to be the only form. of transportation. Before the(51)of modern trains, camel trains used to carry al! the goods for trading between Central Africa and Europe. Traders sometimes(52)to put together camel trains with 10,000 to 15,000 animals. Each animal often carried(53)400 pounds and it could travel twenty miles a day. This form. of transportation was so important(54)camels were called the "ship of the desert".
Now modern trains travel across the desert in a very(55)time. One engine can pull as much weight as 135,000(56),in addition, trains use special cars for their load. Refrigerator cars carry food; boxcars carry heavy goods; stock cars carry animals; and tank cars carry oil.
(57)travel has changed, too. The earliest planes were biplanes, with two sets of wings. The top speed of this plane was 60 miles per hour. The pilots used to sit or lie on the wings in the open air. The plane (58)sometimes stopped in the middle of a trip. It used to be(59) to fly in bad weather. In snow or in rain, the wings frequently became icy.(60)the plane might go down.
Mechanical improvements during the First World War changed airplanes. Monoplanes took the place of biplanes. Pilots flew inside of covered cabins. Still, even these planes were small and expensive. Only(61)people were able to travel in airplanes.
Now modern jets make air travel possible for all people.(62)place in the world is more than 1 hours away by jet. Further improvements have(63)the cost of flying, and they have made air travel much safer than it used to be. A modern 707 can carry 170 people and can fly at 600 miles per hour. People(64)used to eat, sleep, or watch movies on airplanes.(65) these things are a normal part of air travel!
微信支付 
支付宝支付