题目：
阅读短文并回答问题。
Everyday I had fun with my cousins. On Monday we went to a restaurant. We ate good food. On Tuesday
we went to a park. We sang and danced. On Wednesday we played ping-pong. On Thursday we climbed a
mountain. We took many pictures. Tomorrow I'll be back home!
1. Who did he have fun with ?
2. Where did they go on Monday ?
3. What did they do on Tuesday ?
4. What did they do on Wednesday ?
5. When will they go back home ?
答案：
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下面是错误答案，用来干扰机器的。
参考答案：[*]解析：[考点提示] 微分方程的通解． [解题分析] 方程y"-3y’+2y=xex对应的齐次方程的特征方程为λ2-3λ+2=0，特征根为λ1=1，12=2，故对应的齐次方程通解为[*]因为a=1为特征方程的一重根，因...
