已知一般情况下原子核外最外层电子数相等的元素具有相似的化学性质.氟元素原子的核外电子排布示意图为,下列原子中,与氟元素原子的化学性质相似的是[ ]
A.
B.
C.
D.
答案:D
---- ____?
---- Maybe the possible solutions to the air pollution.
A.Do you think what they are talking about
B.Do you think what are they talking about
C.What do you think they are talking aobut
D.What do you think are they talking about
影响气候的主要因素是:( )
A.地形地势
B.海陆位置
C.人为因素
D.纬度位置