癌症复发的根源是()
A.增殖型细胞
B.暂不增殖细胞
C.不增殖型细胞
D.周期性细胞
E.以上都不是
参考答案:E
-Do you like the city life or the country life?
-It's hard to say. In the city there are ________ interesting things, but in the country there is ________ pollution.[ ]
A. less; more
B. more; less
C. more; fewer
D. much; much
暂时冠的作用不是()
A.避免牙髓再度受刺激
B.保持患牙的牙位
C.避免(牙合)面磨损
D.保持近、远中间隙
E.为戴冠提供便利