揉龟尾有治疗腹泻的作用。
参考答案:对
--- Did Mike finish _________ his work?
--- Yes, he finished it very quickly, and he did _________ work.
A.to do; hard
B.to do; easy
C.doing; excellent
D.doing; bad
最大耐受量指在一群个体中不引起死亡的最高剂量。