A:1s22s12p5
B:1s22s22p6
C:1s22s22p63 s2
D:1s22s22p63s1
已知函数y1=ax2+bx,y2=ax+b(ab≠0).在同一平面直角坐标系中.
海拔是指一个地点高出____ 的垂直距离,又称为____ 高度.
Jim Green's family name is .