下列哪项因素与个体对毒物的敏感性有关（）。
A.剂量、浓度和作用时间
B.毒物本身理化特性
C.毒物的联合作用
D.人体遗传特性
E.酶的特性
参考答案：D
She doesn't want to fall behind others. She's _____ to catch up with his classmates. [ ]
A. decide
B. make a decision
C. made a decision
两顺槽超前支护工作的安全要求是什么？
