异地托收承付结算方式有托收和承付两个环节。承付有（）两种。
A.验单付款
B.验货付款
C.定期付款
D.定日付款
参考答案：A, B
— Would you like to join us in a field trip this weekend?
— I’d like to. But I can’t ______ the time because I have an important exam to take on Monday.
A．kill
B．take
C．afford
D．spend
《素问·上古天真论》“筋骨坚，发长极，身体盛壮”，是女子哪个年龄段的生理表现。
A．“二七”B．“三七”C．“四七”D．“五七”E．“六七”
