已知实数x、y满足x2-2x+4y=5,则x+2y的最大值为 ____。
It is that the play will be _____ in Beijing next month.[ ]
A. at
B. in
C. on
D. of
婴儿创伤性溃疡最好发的部位是()
A.舌缘
B.颊黏膜
C.舌系带附近
D.前庭沟黏膜
E.舌背