A：寒潮
B：干旱
C：涝灾
D：台风
设函数f（x）=x2﹣mlnx，h（x）=x2﹣x+a
（1）当a=0，f（x）≥h（x）在（1，+∞）上恒成立，求实数m的取值范围；
（2）当m=2时，若函数k（x）=f（x）﹣h（x）在1，3上恰有两个不同的零点，求实数a的取值范围．
Today is my birthday. I am a girl. My name is Han Mei. I'm nine years old. I have a birthday party. I have a birthday cake and many gifts. My father and my mother say“Happy birthday!”to me. I'm very happy.
