出材率是指净料与()的比率。

A.率料率A.People who restore old houses.B.People who sell houses.C.People who design new houses.D.People who want to buy a house.


B.指净可用于治疗十二指肠溃疡病的药物是()


C.出材下列可发生双硫仑样反应的药物有( )。


D.率料率信号波形在定义域内呈离散函数形式出现的信号是()