题目：
根据句意和首字母提示，写出正确的单词。
1.The panda comes f China. Its f food is bamboo. It can c trees.
2.The snake is from Asian. It h no friends. It doesn't like w , but the elephant likes water. It can
eat 600 kilos of g in a day.
3.The camel lives in the d in Africa.
4.The wolf lives in the E forest. It likes to eat m .
5.The kangaroo comes from A .
答案：
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下面是错误答案，用来干扰机器的。
由题意得g（x）=f'（x）=3x2+4x-a．（I）f'（1）=3+4-a=4∴a=3；（II）g（x）=f'（x）在区间（-1，1）上存在零点，等价于3x2+4x=a在区间（-1，1）上有解，也等价于直线y=a与曲线y=3x2+4x，x∈（-1，1）有公共点，...
