缬氨霉素（valinomycin）是一种脂溶性的抗生素，是由12个分子组成的环状化合物，它的结构简式如图所示，下列有关说法正确的是（　　）

依次填入下面一段文字横线处的语句，衔接最恰当的一组是(　　)
物联网，是指将各种信息传感设备，如射频识别装置、红外感应器、全球定位系统、激光扫描器等装置与互联网结合起来而形成的一个巨大网络。________，________，________，________，________，________。
①以方便和促进我们的生活、生产及至整个社会的发展
②它其实就是将原本与网络无关，但与我们的生活工作息息相关的万事万物都装上传感器
③其目的是让所有的物品都能够远程感知和控制，并与网络连接在一起
④让人们可以更直接地去控制和管理这些事物
⑤然后与现有的互联网连接
⑥方便识别和管理

阅读下文，回答问题

三只小甲鱼

    我家的金鱼缸里养着三只小甲鱼，我喜欢观察它们。小甲鱼的眼睛小得可怜，耳朵不知藏在什么地方，牌子只微微出一点鼻孔。整个头显得小巧玲珑，就是嘴大了一些，有些不相称。小甲鱼的整个身体是黑褐色的，在鱼缸里显得十分清晰。它的脚上有五只坚硬的爪子，可厉害啦！它有背上驮着一个壳，尾巴细而短尾端像针一样尖。

阅读下列短文，从下面每小题的A、B、C、D四个选项中选出最佳选项。

    What's it all about?

    OneSmallDeed.com is a website which lets the world know the good deeds（行动）they have done and to encourage others to do the same.

    Who are we?

    We are not a big organization, but just a group of people who wanted to find a way to make the world a nicer place. We live in London and come from different countries and cultures. The one thing we have in common is that we are kind and giving people who want to see more people like us.

    Want to join?

    All you need to do is just a small good deed as often as you can do. If you want to encourage others, then post your deeds on our website.

    Here are some suggestions for you to get started:

    1  Open the door for someone 

    2  Give up your seat on the train or bus for someone who needs it more than you.

    3  If somebody asks for your help and you are really busy, find a way. 

    4  If someone in need, like a man in a wheelchair to get across the street, help them. 

    5  If you see someone crying, ask if you can help.