Although he had to spend lots of money for going to the ball, he accepted the invitation.____,

the ball was important to him. [ ]

A. After all

B. In all

C. First of all

D. Above all

二维条码较一维码的优点不包括（）。

A.存储信息量大

B.保密性高

C.追踪性高

D.抗损性强

E.资料库依赖性强