有关板块构造学说的叙述正确的是 (       )

    I was on my way home with a friend yesterday ____ I found a mobile phone by the roadside. After picking it up, I suggested that we go to the house in front of which we found the mobile phone. And we did so. I ____ (knock) at the door and two young men answered. Neither of them had lost ____(they) phones, but as I referred to some names on the contact list(通讯录), one of them said he also had those ____(name) and that it must be the phone of one____their friends. Then, he took the phone and said how wonderful it was that I took the time____(find) the owner. Afterwards, I left without ____(leave) my name or address. I never considered keeping the phone. Instead, I immediately tried to find ____ owner. And I believed that was ____(exact) what I would want someone to do if I lost my phone. It couldn't have been ____ (good).

    Sometimes, helping others is just doing the right thing.

我国“候鸟老人”的主要迁移省区是（    ）

用0 ,2 ,3 三张数字卡片摆一摆，能组成几个三位数，这些三位数是2，3，5的倍数吗？在表格里填一填,是的请打“√”。不是的请打“×”。

观察表格，你发现了什么？与同学交流。