直肠癌常发生在()
A.直肠
B.乙状结肠
C.骶骨
D.肛门
E.直肠和乙状结肠交界处
参考答案:E
(2013·辽宁高考)At no time ________ the rules of the game. It was unfair to punish them.
A.they actually broke
B.do they actually break
C.did they actually break
D.they had actually broken
能引起妇女月经过多综合征的毒物有
A.苯、汽油、二硫化碳B.铅、汞、三氯乙烯C.苯、三硝基甲苯、铅D.苯、汽油、汞E.铅、汞、砷