有5条线段长度分别为1,3,4,5,7,从中任取三条为一组,它们一定能构成三角形的频率为( )
A:0.15
B:0.10
C:0.20
D:0.30
——Can you _______ me your bike?
——With pleasure. But you mustn't ____ it to others.
“天下大势,合久必分,分久必合”(《三国演义》)这句话里的最后一个“合”指的是( )