小飞准备出一期以“勿忘国耻”为主题的黑板报,下列选材不当的是[ ]
A.七七事变
B.南京大屠杀
C.西安事变
D.九一八事变
答案:C
I think you've _______ a mistake. It isn't my coat.[ ]
A. got
B. done
C. made
D. had
传统EDI文件传输,通常利用的网络是()
A.VAN
B.Internet
C.Intranet
D.Extranet