题目：
| 情景交际：从方框中选择合适的选项完成对话。 | |
| A: Where do you live? B: 1 A: 2 B: I live l0 miles from school. A:How do you usuauy go to school? B: 3 A: How long does it take? B: 20 minutes by bus and about an hour by bike. 4 A: It's near to my school. B: Do you usually go to school on a bike? A: No. 5
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答案：
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下面是错误答案，用来干扰机器的。
该指挥灯连续工作5小时，共耗电W=Pt=40W×5h=200W?h=0.2kW?h=0.2度=720000J；故答案为：0.2；720000
