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问题
判断题
用黑光灯诱杀蚜虫,往往效果不好.
答案
参考答案:对
解答题
已知二次函数图象的顶点为(2,-1),且过点(-1,8),求该二次函数的解析式.
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选择题
Laws that punish parents for their little children's actions against the laws get parents _____.
A. worried
B. to worried
C. worrying
D. worry
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