Highways Early in the 20th century, most of the streets and roads in the U. S. were made of dirt, brick, and cedar wood blocks. Built for horse, carriage, and foot traffic, they were usually poorly cared for and too narrow to accommodate(容纳) automobiles. With the increase in auto ...
L. N. Edwards, of the United States Bureau of Roads, read a paper on "The Evolution of Early American Bridges" in which he dealt with the work of the bridge pioneers of America down to the time of the Civil War of 1861鈥 65. All the early settlements, he said, were situated on ...
aDo you think i am annoying? 正在翻译,请等待... [translate] aFew roads were built during the early history of the United States since most of the early settlements were connected with the nearest wharf 因为大多及早解决用最近的码头,连接了少量路被修造了在美国期间的早期的历史 [translate] ...
根据Alaska Highway,Alaska部分中的In the early days of World War II,fears of a potential attack on the Territory of Alaska stimulated military officials to create the Alaska Highway.(在第二次世界大战初期,由于担心阿拉斯加领土可能受到攻击,军方官员决定修建阿拉斯加高速公路。)可知,Alaska Highway是为...
B. The first wood pencils were made in America.C. German people first used mixed materials to make pencils.D. People first used graphite to make marks on their sheep. 免费查看参考答案及解析 题目: [阅读理解] On Saturday morning, John got up early to go to a sports club. On his way...
Early in the 20th century, most of the streets and roads in the U. S. were made of dirt, brick, and cedar wood blocks. Built for horse, carriage, and foot traffic, they were usually poorly cared for and too narrow to accomrrmdate(容纳) automobiles. ...
Concrete roads can be opened to traffic earlier than has been assumed hitherto. According to theoretical and practical studies bending tensile strengths of 12-34 kp/sq. Cm are sufficient depending on air temperatures and axle loads, and these can be attained after 1-4 days. However, if the ...
【题目】In this early day of the United States of America, it wasn't easy ___ from one town or city to ___. T here were no trains. Of course,and the roads were very poor. If a man wanted to go from one place to another, he often__ a horse. And because the roads were bad...
The Romans remained in Britain for 400 years. Why did the Romans leave Britain? Their homes in Italy were being attacked by fierce tribes and every soldier was needed. They built roads and public buildings, created a structure of law, and introduced new plants and animals. https://en.wi...
1In this early day of the United States of America, it wasn’t easy ___ from one town or city to ___. There were no trains. Of course, and the roads were very poor. If a man wanted to go from one place to another, he often ___ a horse. And because the roads were bad,...