把下面的六个图形分为两类，使每一类图形都有各自的共同特征或规律，分类正确的一项是（）

有12个小朋友排成相等的几列纵队做操，你能帮他们编队形吗？有几种排法？用○画一画。

I didn't get up earlier as usual last Sunday. In the morning having finished my homework, I do some washing．Then I telephoned one of my classmates and invited them to see a film．But unfortunately, when we got to the cinema, we founded all the tickets had sold out．We had to go back to school or play football．After that, we were about to go to home when we saw our English teacher, Mr. Li, coming towards us．Tom and I asked him some questions about what to learn English well．He told us we had made great progresses in English．He also suggested that we read more and write more．We promised him that we would follow our advice．

排架在荷载作用下其水平位移不会受到其它排架或抗侧向力结构的约束，这种结构静力计算方案在混合结构房屋设计中称为“弹性方案”。

企业可以把整条供应链全权交给第三方物流运作，第三方物流可为供应链功能或流程的全部提供完整的服务。

绕组的绝缘种类包括（）。

A、对地绝缘

B、相间绝缘

C、层间绝缘

D、以上都是