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目前一般车用汽油机的压缩比为,柴油机的压缩。
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【简答题】立方体静止时的密度为 ,当它相对地面以速率c/3沿一条边运动时,地面观测者测得它的密度为 ,则 : = (用小数表示)
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【简答题】立方体静止时的密度为 ,当它相对地面以速率u沿一条边运动时,地面观测者测得它的密度为 ,求 :
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【单选题】It’s common to give a ______ to the waiter after a meal here.
A.
menu
B.
tip
C.
bill
D.
receipt
【简答题】Here are some of the most common causes of fatigue, and what you can do about them. Inadequate Sleep. If you don’t get enough sleep you’ll be tired but it’s rare that busy people get enough sleep. Whe...
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