ETF是一种()。
A.保本型基金
B.债券型基金
C.货币型基金
D.指数型基金
参考答案：D
解析：ETF是一种指数型基金。
正常人每日需要摄入（）的蛋白质。
---She’s never been to Hainan, ________?
---________. She went there last week for the first time.
A．has she; Yes, she has
B．has she; No, she hasn’t
C．hasn’t she; Yes, she has
D．hasn’t she; No, she hasn’t
