易变色的中药是
A．根及根茎类药材
B．皮类药材
C．叶类药材
D．果实种子类药材
E．花类药材
参考答案：E
--Where do you suggest_________?
--Downtown in Quanzhou, of course.
A．will we locate the museum
B．the museum must be located
C．the museum be located
D．should we locate the museum
挤捻法修整刃口时，将凹模或凸模的淬火硬度将至（）。
A、38～42HRC
B、18～22HRC
C、28～52HRC
D、38～62HRC
