A：nothing important
B：important nothing
C：something important
D：important something
将函数f（x）=sin2x的图象向右平移φ（0＜φ＜ π2 ）个单位后得到函数g（x）的图象．若对满足|f（x1）﹣g（x2）|=2的x1、x2，有|x1﹣x2|min= π3 ，则φ=（ ）
The old man______ the street when he was hit by a car.
下列省区之间以黄河干流为天然界线的是
