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,且,则锐角

A. B. C. D.

D

解析试题分析:根据题意,由于,且,那么则有,由于角为锐角,那么可知锐角=,故选D.
考点:向量的共线
点评:主要是考查了向量的共线的概念的运用,属于基础题。

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