牡丹皮的优品标准描述的是()。
参考答案:皮厚、切面色向、粉性足、香气浓
-What a nice computer!
-My parents bought it for my sister and me. It's
A.ours
B.hers
C.theirs
D.mine
按照三原色和三补色之间的关系,从白光中减去绿光就会成为()
A.青光
B.黄光
C.紫光
D.品红光