某班七个兴趣小组人数分别为3，3，4，x，5，5，6，已知这组数据的平均数是4，则这组数据的中位数是[ ]
A．2
B．4
C．4.5
D．5
答案：B
对外营业机构运营主管由该机构的上级管辖行委派，运营主管的工作直接对受派机构负责。
Earth Day is a celebration of life and our planet. It is a reminder that we need to ______ the world we live
in and that we should learn to respect life and nature. [ ]
A. care about
B. think over
C. take possession of
D. refer to
