题目

下面给出了用三角尺画一个圆的切线的步骤示意图，但顺序需要进行调整，正确的画图步骤是．① ② ③ ④ 答案：【1】②③④① Fill in the blanks with the verbs in their proper forms（用所给动词的适当形式填空，词数不限）： Fill in the blanks with the verbs in their proper forms（用所给动词的适当形式填空，词数不限）： Tom as well as two of his classmates ______(invite) to the concert the other day．