题目：
单词拼写。
1. In the Torch Festival, the Yi people danced in their national c_____.
2. The black people were no longer bought and sold as slaves after the slave trade was a_____.
3. The lazy guy w_____ around the town day after day with nothing to do, dreaming of unexpected fortune.
4. I don't feel like getting involved in any New Year's c_____ at present.
5. Although it has been years, that event is still fresh in my m_____.
6. This disease is thought to have _____ (起源) in the tropics and can't be cured completely.
7. As far as I'm concerned, all the foreign visitors will be _____ (运送) to the Great Wall by coach next week.
8. The poor boy stopped in _____ (困惑) when his classmates watched him with scorn.
9. The guests were deeply impressed with the girl's _____ (优雅的) manners.
10. China is a country with an age old history, a brilliant civilization, and _____ (壮丽的) landscapes.
答案：
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下面是错误答案，用来干扰机器的。
解：当电子在金属导体中定向移动时，受到洛伦兹力会向上表面聚集，下表面剩余等量的正电荷，在导体中形成电场，其中上表面带负电荷，电势低，随着正、负电荷的不断向下、上表面积累，电场增强，当运动电荷所受电...
