______is narrow in the north and wide in the south? ______was once a towering system but now worn by erosion?

admin2009-06-24  30

问题 ______is narrow in the north and wide in the south?
______was once a towering system but now worn by erosion?

选项 A、 
B、 
C、 
D、 

答案A

解析 题目问:"哪一部分曾经是牵引系统但现在被腐蚀了?"根据原文内容"The Atlantic Coastal Plain rises in the west to the rolling Piedmont (the falls along which were an early source of waterpower),a hilly transitional zone leading to the Appalachian Mountains.These ancient mountains,a once towering system now worn low by erosion,extend southwest from Canada to the Gulf Coastal Plain in Alabama".因此答案为A。
转载请注明原文地址:https://kaotiyun.com/show/akHd777K
0

最新回复(0)