问题
选择题
— Could you please ______ us some stories?
— Ok. [ ]
A. say
B. talk
C. tell
D. speak
答案
答案：C
搜题请搜索小程序“爱下问搜题”
— Could you please ______ us some stories?
— Ok. [ ]
A. say
B. talk
C. tell
D. speak
答案：C
是3×4矩阵，其秩为3，考虑方程组
。