[判断题]
xxxxxxxxx
[img]data/attachment/exam/2510/24/2510241250320441.jpg[/img] a vector has a directitrsi*a u:0 pz,on rz4c-2x:.coz xa( epy.
参考答案:
本题详细解析: This is true because a vector is a quantity with nobdz( t )yl),g(3wufltt only a magnitude but also a direction. So the d ttg(f3z(,b)w lly) uanswer is true.