题目

My friend Mary is ___ 11-year-old beautiful girl and ___ girl everyone likes to work with. A. a, a                         B. a, the                       C. an, a                              D. an, the 答案：C画一次函数y=2x+3的图象需要两个点，现已有一点（2，7），请你再找出一个点（1，5）（答案不唯一）（1，5）（答案不唯一）．