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第1题

What is Helen.s suggestion? 选择一项： A. To take the bus. B. To build more roads. C. To ride bikes.
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第2题

Why does the transportation system need to be improved? 选择一项： A. Because it.s old B. Because it.s costly. C. Becau
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第3题

力偶可在其作用面内任意移转，不会改变它对刚体的作用效果。 × √
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第4题

Why is Mike late for work? 选择一项： A. He is caught up in a traffic jam. B. He got up late. C. His car is broken down
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