题干
— It's nice to meet you here, Dale.
— Ha, I'm ________ to see you, too.
A：late
B：happy
C：first
D：easy
答案(点此获取答案解析）
B
— It's nice to meet you here, Dale.
— Ha, I'm ________ to see you, too.
A：late
B：happy
C：first
D：easy
则函数
的零点个数为 （ ）