可以作为监测环境污染的指示动物是[ ]
A．眼虫
B．草履虫
C．变形虫
D．衣藻
答案：A
肾复合性囊肿不包括（）
A.钙化性囊肿
B.不典型囊肿
C.感染性囊肿
D.出血性囊肿
E.囊性肿瘤
Your father never smokes, _____? [ ]
A. did he
B. does he
C. didn't he
D. doesn't he
