【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.
【判断题】碱性焊条一般只需低温烘干(70~150°C),最高不超过250°C,保温1~1.5h。