【单选题】The woman ______ you met at my home was a teacher of English. Which of the following is wrong ? [ ]
【简答题】设 在 有定义,则下列函数为奇函数的是____
【单选题】My English teacher insisted that the exercises ____very difficult and that we ____them carefully.
【单选题】刘某,72岁,每天早晨起来坚持锻炼身体。刘某的行为属于自我保健中的