题目

根据短文内容，选择最佳答案。 Hello, everyone! I'm a little rabbit. My name is Hanhan. Look! I'm very lovely. My eyes are red. My ears are very long. My hair is white. My tail is short. I like carrots very much. I have a good friend. She is my little master. Her name is Lisa. We always play games together. I like her very much, and she likes me too. （1） The rabbit's name is ________. A . Hanhan B . Huahua C . Tom （2） Hanhan's eyes are ________. A . black B . red C . yellow （3） Hanhan's tail is ________. A . long B . short C . wide 对于二次三项式x2+10x+46，小明作出如下结论：无论x取任何实数，它的值都不可能小于21．你同意他的说法吗？说明你的理由．