test_copy1012 (id: 0b7bbc175)

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[判断题]
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a vector has a directioor b49yfiv5 o-p:w x4fzl.w .zro90:,14(zz26 d loctfjao oh)o ljb sn.

参考答案: 


本题详细解析:
This is true because a vector is a quantity with not only a r8-uv)lf1 b(kzf dmyly5d4 ;emagnitude but also a direction. So the a4lbd ylvr)fm8zf1;yd-k e(u5nswer is true.