已知函数. (I)求的最小正周期; (II)求在区间上的取值范围. 答案:解:(I) - 最小正周期为, (II)因为,所以 - 所以 所以,所以取值范围为.-选出问句答语匹配正确的一项。1. What do you want to do? 2. Do you like the dress? 3. Where are you going? 4. Where is the gym?a. Here it is. b. No. c. I want to go to the store. d. To the office.A. 1-c; 2-b; 3-d; 4-aB. 1-d; 2-b; 3-c; 4-aC. 1-c; 2-a; 3-d; 4-bD. 1-c; 2-b; 3-a; 4-d