在一个不透明的口袋中，装有5个红球3个白球，它们除颜色外都相同，从中任意摸出一个球，摸到红球的概率为（     ）

 下列变化中所涉及到的物质都是初中化学常见的物质。
（1）A、B常温下为液态，A能分解成B和C。该反应的化学方程式为____ 。
（2）C与D发生化合反应可生成E，且D、E由相同的两种元素组成，E与F反应生成G和B，工业上G常用于洗涤剂的生产，E与F反应的化学方程式为____ 。
（3）若G和H分别与M反应都生成B、E和N，医疗上常用N来配制生理盐水。H与M反应的化学方程式为____ ；G、B、E在常温下可发生化合反应生成H，该反应的化学方程式为____ 。
（4）若在饱和的澄清石灰水中通入或加入以上某种物质，会观察到澄清石灰水变浑浊，该物质可能是____ （答三种不同类别的物质）。

“数以亿计的人可在自家屋顶、田间建立一个小型发电厂，只要它覆盖着太阳能电池板，而且通过互联网和电网与世界连接相互交易”，这是“互联网+能源”的一个远景和行动。其重大意义在于（  ）

①每个人都可以是电力消费者也可以是生产者

②可以极大地促进能源的清洁替代和绿色替代

③能源供给结构将实现电能化且价格十分低廉

④“互联网+能源”能全面推动各传统产业升级

    Children sometimes get sick(生病) and need to go to hospital. Some of them have to stay there for a few ____ (day). It is not good for them____ (think) about their sickness all day long. They need some other things to think about, so people ask animals ____ help. In some places, workers from zoos often ____(take) animals to visit children in hospital. They may bring a little dog or a  ____(cute) monkey with them. Children are ____ (exciting) to see them.

    ____ ，some children cannot get close to the animals. The animals may make their sickness get even____ (bad). How can we help these children? The hospitals get another good idea. They work with zoos to make movies. The movies are all about lovely animals. Children in hospital can watch these movies and learn the animals' ____ (live) habits. A man____(call) Denny Sanford made a TV network (网络)to show these movies. It is used in many hospitals in the US today.

如图，将三角形向右平移2个单位长度，再向上平移3个单位长度，则平移后三个的坐标是（　　）