单选题：The current American school calendar was developed in the 19

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题目内容：
The current American school calendar was developed in the 19th century according to A．the growing season on the nation's far
B．the labour demands of the industrial ag
C．teachers' demands for more vacation tim
D．parents' demands for other experiences for their kid
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Teachers in this school were encouraged to use drama as a (n) __________ of lear

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When you have finished with that book, don't forget to put i

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根据材料，下列说法推断正确的是（　）。[1]汶川地震造成的经济损失约为其他一次成灾地震的平均损失的117倍。[2]道路交

根据材料，下列说法推断正确的是（　）。[1]汶川地震造成的经济损失约为其他一次成灾地震的平均损失的117倍。[2]道路交通方面，我国2008年约有车辆1.7亿辆

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