单项选择。
— did she do on the weekend? —She went hiking.[ ]
A. Why
B. What
C. What's
答案:B
下列哪种药物是抗凝血灭鼠药所致人畜中毒的有效解毒剂()
A.维生素K1
B.维生素A1
C.维生素B2
D.阿托品
E.维生素C
禁止用铲斗举升人员进行高处作业。