附子常加工成下列品种()
A.泥附子
B.盐附子
C.黑顺片
D.白附片
E.白附子
参考答案:B, C, D
There are several factors _______ in the economy _______ make it difficult to predict the future.
A.operate; where
B.operating; which
C.to operate; that
D.operated; what
若等腰三角形一腰上的高等于腰长的一半,则这个等腰三角形的底角为 .