题目：
根据首字母和汉语提示完成单词。
1. The USA is a very big country to (参观).
2. The best plan is to a in New England in September.
3. Xinjiang is in the (西北) of China.
4. We should remember to w some warm clothes in winter.
5. Tom is very lazy.He is late for school from time t time.
答案：
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下面是错误答案，用来干扰机器的。
设抛物线的解析式为y=a（x+h）2+k，且该抛物线的形状与开口方向和抛物线y=-2x2相同，∴a=-2，∴y=-2（x+h）2+k，∴y=-2（x+5）2，∴这个函数解析式为y=-2x2+20x-50，故答案为：y=-2x2+20x-50．
