A:13-6=7(枝)
B:13+6=19(枝)
C:6+13=19(枝)
D:13-7=6(枝)
下图为中亚某区域等高线图,读图回答问题。
作图
“4<k<6”是“方程x26-k+y2k-4=1表示椭圆”的( )
Rose received a letter full of love from her parents on her ______ birthday.