显晶质结构
参考答案:
肉眼或放大镜能够辨认出矿物颗粒之间的界限。
---Is the Youth Center open to the public yet?
---Yes. It ______ for almost one and a half years.
A.has opened
B.has being opened
C.has been open
D.was open
竹茹宜采用的炮制方法是()
A.酒炙法
B.盐炙法
C.姜炙法
D.油炙法
E.蜜炙法