【C6】A．bondB．bonusC．tariffD．voucher

— Do you mind if I use vouchers to spend in a restaurant？— __________A: Yes, please.B; N

听力原文：Fifty years ago, Milton Friedman proposed a Voucher System to improve American ed

Mr. Milton founded the voucher programs at the age ofA．50.B．53.C．43.D．33.

Which of the following is TRUE according to the text？A．The author thinks that voucher prog

【C8】A．paymentB．bonusC．salaryD．wage

黄酮类化合物的基本骨架是A．C3-C6-C6B．C6-C3-C6C．C6-C6-C6D．C3-C6-C3E．C6-C6-C3