世界最古老的文明是[ ]
A.中华文明
B.埃及文明
C.两河文明
D.印度文明
答案:C
试析相关分析和回归分析及其异同?
The world is changing _______________. [ ]
A. for the first time
B. from time to time
C. at that time
D. all the time