题目

阅读下面短文，在空白处填入 1 个适当的单词或括号内单词的正确形式。Cold Food Day, which honors Jiezitui, a hermit (隐士）who lived some 2600 years ago，used to be observed 【1】 (wide), but today few Chinese observe it except on and around the mountain on 【2】 the hermit lived.Jiezitui served 【3】 an advisor to Chong’er, a prince in the state of Jin. A civil war forced the prince 【4】 (leave) Jin and Jie Zitui followed him. 【5】, when Chong’er returned and became the ruler of Jin, his followers were rewarded with money, land and official jobs 要使二次根式有意义，则x的取值范围是（ ）A. x<3 B. x≤3 C. x>3 D. x≥3