有关行政机关应当自收到转送、交办的信访事项之日起多少日内决定是否受理？
参考答案：
应当在１５日内决定是否受理。
用括号内所给词的适当形式填空
1. My brother __________(have) a basketball.
2. Let's watch __________(they) on TV.
3. She __________(play) sports every day.
4. __________(do) your sister have a computer?
5. We have many sports __________(club) in our school.
液态石油主要生成在油气质热演化的（）
A.未成熟阶段
B.成熟阶段
C.高成熟阶段
D.过成熟阶段
