m阶B树的根结点至少有几棵子树A.0 B.2 C.m-1 D.1 发布时间:2017-06-13 19:38 │ 来源:www.tikuol.com 题型:单项选择题 问题: m阶B树的根结点至少有几棵子树A.0B.2C.m-1D.1
题型:单项选择题 He can't ____ English? He is ____ a lie. [ ]A. say; tellingB. speak; saying C. speak; telling D. talk; speaking 查看答案