list1=[1,3,4] list2=[3,5,2] (list1+list2)*2
的值为？（ ）
[8,16,12]
[1,3,4,3,5,2,1,3,4,3,5,2]
[1,3,4,1,3,4,3,5,2,3,5,2]
[2,6,8,6,10,4]