根据以下特征，基本可确定为变造票的是（）。A.大写金额栏红外下

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问题多项选择题

根据以下特征，基本可确定为变造票的是（）。

A.大写金额栏红外下观察有涂改痕迹

B.荧光主题图案有破坏现象

C.票号处荧光团花不完整

D.没有荧光纤维丝

答案

参考答案：A, B, C

解答题

．（12分）（理）抛物线y=ax²＋bx在第一象限内与直线x＋y=4相切．此抛物线与x轴所围成的图形的面积记为S．求使S达到最大值的a、b值，并求S_max．

填空题

根据句意及首字母提示完成单词。

1. He is very w_____. He always does things without thinking carefully.

2. The story made us 1_____.

3. He had a bad grade in the English test. His father wasn't happy and

b_____ him yesterday evening

4. Jim likes math. But Jack likes p_____.

5. They don't agree with you. They have other v_____.

6. Lucy does her s_____ every day.