附属卡升级主卡需()持本人有效证件办理。
A.主卡持卡人和附属卡持卡人
B.附属卡持卡人
C.主卡持卡人
参考答案:B
Personal computers _______ in 1976. It has changed the whole world. [ ]
A. have been invented
B. are invented
C. were invented
D. invented
龙骨和牡蛎的共同功效是
A.平肝潜阳
B.软坚散结
C.收敛固涩
D.镇惊安神
E.制酸止痛