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最佳答案:himself
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最佳答案:斜坡匀速行驶Uniform velocity on the slope高速环形试验路面High-speed circular road test横向越过壕沟Ho
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最佳答案:The little improvement of strength and toughness generates from the brittleness
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最佳答案:Recent one decade ,one great change of the global agricultural trade markets is