题目

已知函数，若数列满足，且是递减数列，则实数的取值范围是(    ) （A）         （B）         （C）         （D） 答案：C根据中文提示，用词组的适当形式填空。每空一词。 1．I hope that my dream will                         (实现)in the future． 2．My grandma goes to the park                         (步行)every morning． 3．--Are you                (擅长)chemistry?     --Yes，I am． 4．The physics problem is so difficult that I can’t         it           (算出)． 5．One of my classmates is going to be a policeman when he                   (长大)．