“孑孓”是哪种动物的幼虫?()
A.蝴蝶
B.蚂蚁
C.蜜蜂
D.蚊子
参考答案:D
解析:
孑孓由雌蚊在淡水中产的卵孵化而成。孑孓经四次蜕皮后发育成蛹,由蛹再羽化为成蚊。本题选D。
皆能活血行气的药物是()皆能活血调经,利水的药物是()
A.川芎、延胡索
B.没药、红花
C.益母草、牛膝
D.水蛭、虻虫
E.血竭、儿茶
The incidence of this disease has been greatly reduced thanks to our health care program.()
A. seriousness
B. frequency of occurrence
C. mortality
D. cure rate