下列每组数分别是三根小木棒的长度,其中能摆成三角形的是( )
A:3 4 5
B:7 8 15
C:3 12 20
D:5 5 11
如图字母A代表的是( )
---I can't work out the math problem, what should I do?
---You can turn to the teacher.