券面上既不贴息，也不标明利率的债券是（）
A.附息债券
B.贴现债券
C.存款单式债券
D.外国债券
参考答案：B
He _______ more visits to his parents.He has been regretting not doing so since they passed away.
A．should pay
B．would pay
C．should have paid
D．would have paid
马化腾开创了（）
A、MSN
B、OICQ
C、奇瑞QQ
D、腾讯QQ
