关于控制区的范围及区域关系不对应的是()。
A.A是国内航班旅客候机隔离区
B.B是国内航班旅客行李到达区
C.C是机坪
D.D是登机
参考答案:B
求经过点A(2,-1)且与点B(-1,1)的距离为3的直线方程.
Childhood is central to William Blake's concern in the Songs of Innocence and ______.
A. Songs of Experience B. Song of MyselfC. Poetical Sketches D. Marriage of Heaven and Hell