如图所示为实验室中常见的气体制备、净化、收集和性质实验的部分仪器．试根据题目要求，回答下列问题：

（1）欲在实验室中制备并收集干燥的氧气．

①所选仪器的连接顺序为　 ____　（填写仪器序号字母）．

②仪器A中，发生反应的化学方程式为　 ____．

（2）欲用足量纯净的一氧化碳气体测定某不纯氧化铁样品的纯度（杂质不反应），并验证反应中气体生成物的性质．所选仪器的连接顺序为：纯净的一氧化碳气体→D→B→C．

①仪器C的作用是 ____．

②仪器D中发生的化学反应方程式为　 ____　

③反应完全后，计算氧化铁样品的纯度时，小强同学认为“仪器D中减少的质量等于仪器B中增加的质量”．小丽同学通过称量发现二者质量并不相等．请你分析写出仪器D中减少的是 ____．

某粒子的结构示意图如图所示，对该粒子的说法错误的是（　　）

海洋环境问题是指（　　）

①海洋资源开发问题             

②海洋污染问题

③海上航运与空间开发          

④海洋生态破坏．

下列城市中利用智能化“风光路灯”效果最佳的是（  ）

    Tom was a farmer. He worked on the farm all day，but sometimes he went to the town market to sell fruit and vegetables. One day, a terrible sound attracted his attention in the town market. He saw a young bull for sale. The bull was white and yellow. It was looking at Tom in fear. Tom walked up and touched its head gently. Just at that time they both seemed to have known each other for a long time. How amazing！Tom bought it at once and called it Amba.

    From then on ， Tom and Amba got on well with each other. But some friends told him that it was dangerous to have such a close relationship with an animal.

    One afternoon， Tom was walking through the forest with Amba. Suddenly， Amba stopped walking and kept pushing Tom with its head. Tom was very surprised and looked around. There was a big snake in front of him. It was beautiful but poisonous. Quickly Amba stepped on the snake's tail with its foot and at the same time Tom picked up a stick and hit the snake's head heavily. Soon the snake died.

    Tom was very grateful for Amba's help. When people heard this, they were shocked at the bull's expression of love for Tom. But for Tom, Amba was not a bull but a member of his family.