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【简答题】
合并文件的命令是
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举一反三
【单选题】听力原文： Americans eat breakfast and lunch quickly unless it is a social, business or family occasion. The evening meal is usually longer and a time for families to gather together. Rushing through dayti...
A.
When the food is too hot.
B.
When they enjoy the food.
C.
When there is no one waiting.
D.
When they are eating with their families
【单选题】听力原文：Americans eat breakfast and lunch quickly unless it is a social business or family occasion. The evening meal is usually longer and a time for families to gather together. Rushing through daytime...
A.
Where Americans eat.
B.
What time Americans eat dinner.
C.
Why Americans eat in a hurry.
【简答题】Americans eat breakfast and lunch quickly unless it is a social business or family occasion. The evening meal is usually longer and a time for families to gather together. Rushing through daytime meal...
【简答题】从效率的观点来看,机械的自锁条件是____________________。
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