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【简答题】
下图是甲、乙、丙三个人单独完成某项工程所需天数的统计图，请看图回答。 ①甲、做这项工程，（ ）天完成。 ②先由甲做3天，剩下的工程由丙做，还需要（ ）天完成。
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举一反三
【简答题】From which year on did Belgium have a steady rise in the number of accidents?
【简答题】From which year on did Italy have several years of steady fall in the number of accidents?
【单选题】Which of the following did not occur in the conversation?
A.
The year when Mr. Sun has graduated.
B.
How Mr. Sun left his school.
C.
The name of the school from which Mr. Sun has graduated.
D.
Mr. Sun' s major in the school.
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