柜台办理贷记卡约定还款申请成功后，将在（）生效。
A.下一工作日
B.即时生效
C.下一账单日
D.下一还款日
参考答案：C
An overwhelming richness of vegetation may have caused the level of oxygen, to rise above today's ______ , with a corresponding depletion of carbon dioxide.
A．concentration
B．saturation
C．satiation
D．plenitude
明清时期有哪些民间歌舞，说唱？
