阅读资料：三聚氰胺性状为纯白色单斜棱晶体，分子式为C₃N₆H₆．无气味，无味道，密度为1.573g/cm³，熔点是354℃．溶于热水，微溶于冷水，常温下100g鲜牛奶可以溶解0.33g三聚氰铵．常温下较稳定，但在高温下可能会分解放出氰化物有剧毒．三聚氰胺水溶液呈碱性，与盐酸、硫酸等能形成三聚氰胺盐．三聚氰胺可以作为生产三聚氰胺甲醛树脂的原料．

（1）以上描述属于物理性质是____ 

（2）为安全起见，一般采用三聚氰胺制造的食具都会标明“不可放进微波炉使用”．试解释相关原因：____ 

（3）三聚氰胺也被人称为“蛋白精”，价格便宜．试解释三聚氰胺可以掺入奶粉中不被消费者发现的原因是____ 

（4）三聚氰胺一般只在奶粉中添加三聚氰胺，鲜牛奶中一般不添加．尝试说出原因（一点即可）____ ．

（5）下架的“三鹿”奶粉若进行焚烧处理．焚烧时烟尘经过滤后排入空气中，三聚氰胺燃烧时生成三种物质，其中一种物质在空气中含量最多，三聚氰胺燃烧的化学方程式是　____   烟尘进行过滤的目的是____ 

（6）某同学欲利用家庭实验检验某品牌奶粉中是否含有大量的三聚氰铵．他准备黑布一块和空杯一个．把黑布蒙在空杯口将冲好后冷却的牛奶倒在黑布上，如有白色固体出现，那就很可能是三聚氰胺．以上用到的化学原理有____、____ ．

    Would it surprise you to learn that, like animals, trees communicate with each other and pass on their wealth to the next generation?

    UBC Professor Simard explains how trees are much more complex than most of us ever imagined. Although Charles Darwin thought that trees are competing for survival of the fittest, Simard shows just how wrong he was. In fact, the opposite is true: trees survive through their cooperation and support, passing around necessary nutrition “depending on who needs it”.

    Nitrogen (氮) and carbon are shared through miles of underground fungi (真菌) networks, making sure that all trees in the forest ecological system give and receive just the right amount to keep them all healthy. This hidden system works in a very similar way to the networks of neurons (神经元) in our brains, and when one tree is destroyed, it affects all.
     Simard talks about “mother trees”, usually the largest and oldest plants on which all other trees depend. She explains how dying trees pass on the wealth to the next generation, transporting important minerals to young trees so they may continue to grow. When humans cut down “mother trees” with no awareness of these highly complex “tree societies” or the networks on which they feed, we are reducing the chances of survival for the entire forest
   “We didn't take any notice of it.” Simard says sadly. “Dying trees move nutrition into the young trees before dying, but we never give them chance.” If we could put across the message to the forestry industry, we could make a huge difference towards our environmental protection efforts for the future.

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    Imagine you are in a jumping contest. Animals and insects can also enter this contest. But they might just leave humans in the dust!

    The first event is the long jump. The human athlete is Mike Powell. In 1991, he jumped nearly 30 feet, which is the world record for the long jump. That is about five times his own height.

    His competitor in the long-jump contest is a frog named “Rosie the Ribbiter.” Rosie set the world record for frogs in 1986 by jumping more than 21 feet. Her record has never been broken by any other frog. Compared to Mike Powell, Rosie's jump is not that amazing. But wait! Rosie is only about 10 inches long when her legs are stretched to their full length. She can jump more than 25 times her size. Rosie, the frog, wins the long-jump event.

    The next event is the high jump. Javier Sotomayor, the world record holder, can jump a bar (横杆) 8 feet high. That is about as high as the ceiling in most homes.

    Looking around for someone to challenge his record, Javier might need a magnifying glass (放大镜). The next contestant is a tiny insect called the spittlebug (吹沫虫).

    The spittlebug can jump 28 inches into the air. It is only a quarter-inch long, less than the width of a pencil. If the spittlebug were the same size as Javier, it would be able to jump 600 feet into the air. That is like a human jumping over a building 55 stories high!

    Though the humans lose the “jumping contest,” their competitors would probably agree that Mike and Javier are still pretty excellent athletes. If only Rosie and the spittlebug could speak!

孝敬父母是中华民族的传统美德，下列古语中反映出子女对父母感激之情的是（  ）

四川芦山地震后，国际红十字会在其“家庭联系”网站上设立专门页面，帮助人们寻找在地震中失去联系的亲人。国际红十字会是（  ）