【单选题】听力原文: Today I'm going to discuss transportation and communication in the early 19th century in the United States. At that time, inland waterways provided North America's most popular form. of long dis...
A.
The role of inland waterways in the nation's growth.
B.
The development of New York City as a seaport.
C.
The growth of the railroads.
D.
The disappearance of the c system.
【单选题】随着建筑物高度的增加,变化最明显的是()。
【单选题】听力原文: Today I'm going to discuss transportation and communication in the early 19th century in the United States. At that time, inland waterways provided North America's most popular form. of long dis...
A.
The role of inland waterways in the nation's growth.
B.
The development of New York City as a seaport.
C.
The growth of the railroads.
D.
The disappearance of the c system.
【判断题】抹灰工程中,不同品种的水泥可以混合使用。
【单选题】随着建筑物高度的增加,变化最明显的是()。