云南布依族每到三月三左右就有染花米饭的习俗。          。          。          。          。          。          。

①据说在布依族中流传已有近900年的历史

②云南花米饭有五种颜色，即红、黑、黄、白、紫

③传统的原始布依族花米饭均是手工制作，过程复杂，步骤多

④花米饭是一种纯天然的绿色食品，色彩鲜艳，香味浓郁，美味可口，是布依族的特产

⑤从野生植物原材料的采摘、晾晒、清洗、水煮

⑥再到放入糯米浸泡、清洗、蒸煮、出锅阴干、密封储存，一步步都是纯手工完成

    WIRES is short for Wildlife Information and Rescue Service. It is an Australian  organization, established(成立) in 1985 to care for injured and orphaned(失去母兽的) native wildlife. WIRES has a network of hundreds of volunteers who rescue and care for native animals until they are well enough to be released (释放)into the wild. Volunteers look after rescued animals in their own homes and are trained in the special needs of native wild animals.
    When Australians find a native animal in trouble, they often call WIRES for help. WIRES may be asked to look after a possum that has been attacked by a cat, rescue a large lizard that has got its head caught in a drink can, or care for a baby animal who has lost its mother. People call WIRES when they want to move a dangerous snake away from their garden or when they find a seabird that has swallowed(吞下) a fishing line or an owl with a broken wing. Sometimes kangaroos jumped onto the road in front of cars and are run over. Australians are encouraged to check the pouch(育儿袋)of dead kangaroos in case there is a baby in it. WIRES volunteers find themselves caring for many babies orphaned in this way.
Each year, in the summer, parts of Australia suffer from(受苦) huge bush fires. These fires not only destroy human homes and put people in danger, but they also destroy animal habitats(栖息地)and endanger the animals living in the bush. After a big fire, WIRES and other organizations go into the district to pick up surviving animals. They are treated for burns, shock, smoke and other problems and then cared for until new location can be found for them.
    WIRES is also involved in educating people in the importance of caring for wildlife and wildlife habitats. Volunteers visit schools and other public places to talk about native animals. Sometimes they bring a bat or some other interesting animals with them to show to people who may never have seen one up close before.

根据资料报道，世界上每年因锈蚀而报废的金属设备和材料相当于年产量的20%～40%，某实验小组对铁的锈蚀进行了如下探究．如图所示，将包有样品的滤纸包用大头针固定在橡胶塞上，迅速塞紧，观察到量筒内水沿导管慢慢进入广口瓶（净容积为146mL）．当温度恢复至室温，且量筒内水面高度不变时读数（此时瓶内氧气含量近似为零）．记录起始和最终量筒的读数以及所需时间如下表．

（1）金属腐蚀的过程实际上就是金属元素化合价____ （填“升高”或“降低”）的过程．

（2）实验①和②说明NaCl可以____（填“加快”或“减慢”）铁锈蚀的速率．

（3）实验开始后，广口瓶内温度有所上升，说明铁的锈蚀过程是____（填“放热”或“吸热”）过程．

（4）实验结束后取出滤纸包，观察到有红棕色物质生成，该物质的化学式是　____ ．

（5）实验①和③是探究碳对铁锈蚀速率的影响，请在表格空白处填写实验③的样品组成．

（6）该装置还可用于测量空气中氧气的含量，根据上述数据计算氧气的体积含量是　____ %（精确到0.1%）．试分析该实验结果出现误差的原因：____ （写出任意一条即可）．

某地建设了以沼气池为核心的生产自净农业生态系统，图1是该生态系统的结构模式图，图2是厌氧沼气池的结构模式图。请回答下列问题：