经肝脏细胞色素P酶系转化解毒的毒物与此酶系的抑制剂联合作用,此毒物的毒性效应将()。
A.减弱
B.增强
C.潜伏期延长
D.持续时间缩短
E.无变化
参考答案:A
Mr. Brown ______ with US since he came to Xinjiang. [ ]
A. worked
B. have worked
C. works
D. has worked
安徽花鼓灯的典型步伐有什么?()
A.前踢步
B.簸箕步
C.后踢步
D.三步一踢