在一项队列研究中,某年龄组的观察人数如下计算其暴露人年数为
()
A.9000
B.3010
C.4010
D.3760
E.6000
参考答案:C
Teachers often tell us _____ in the river after school. [ ]
A. don't swim
B. not swim
C. not to swim
有机磷中毒时应用阿托品,下列哪项是错误的()
A.用量应根据病情适当使用
B.达到阿托品化后减少阿托品的剂量或停用
C.与胆碱酯酶复活剂合用时,阿托品的剂量应减少
D.重度中毒时应静脉给药
E.当出现阿托品中毒时应立即间隔给药