Cathy said she speak four languages.[ ]
A. may
B. could
C. would
D. can
答案:B
资料收集的总体要求中最重要的足( )。
A.计算准确
B.真实可靠
C.掌握技巧
D.录入准确
预购电方式有:()。
A.银行卡扣
B.卡表购电
C.负控购电
D.预交电费