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We aim to increase the speed of delivery.
A:velocity
B:impulse
C:ratio
D:atrocity
B:impulse
C:ratio
D:atrocity
参考答案
参考解析
解析：本句意思：我们力争提高送货速度。speed(运行的）速度，速率。velocity速度，高速； impulse冲动，心血来潮，一时的念头；ratio比率，比例；atrocity（尤指战争中的）残暴行为。
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