[判断题] (10分)鉴于图书产品的文化性,图书还应兼顾社会效益。( )https://bgk-photo.cdn.bcebos.com/810a19d8bc3eb135dd4f32dab61ea8d3fc1f44c3.jpg https://bgk-photo.cdn.bcebos.com/71cf3bc79f3df8dcd3930af0dd11728b47102820.jpg
A:错https://bgk-photo.cdn.bcebos.com/7c1ed21b0ef41bd5b8d86d9541da81cb38db3dc3.jpg https://bgk-photo.cdn.bcebos.com/c995d143ad4bd1135e6332534aafa40f4bfb0520.jpgB( )
发布时间：2024-06-06 00:49:10
A.错
B.
13)已知向量
,若
,则
= 。
A.错
B.
A.错
B.
