某校化学兴趣小组为研究燃烧的条件，设计了如图所示的A、B、C、D四个实验。请根据各个实验分析：
(1)A与C比较，设计较严密的是_ _____，因为______________________________
(2)B与C比较，B实验设计的改进之处是_______________________，这样改进的构想是为了说明________________________________________________。
(3)D实验时，可观察到的现象是__________________________________。这说明_________________________________；当森林或草原发生火灾时，灭火的重要措施之一是在火势发展前砍掉树木杂草开出防火道，阻止火势蔓延，就是采取______ ___的原理。
(4)“化学实验的绿色化”要求实验室的“三废”排放降低到最低程度并能得到妥善处理。而在实验的过程中同学们发现该实验明显与要求不符，所以将实验进行改进。请你思考同学改进实验的原因：（出现与“实验绿色化”不相符的现象） ；你有何建议 （写出需要添加的实验仪器即可）。
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Which animal do you think is "the king of the animals", the elephant, the lion or the tiger? They are all
large and strong. But I think the tiger is "the king of the animals". If you watch carefully, you
can find some black lines on the tiger's forehead (前额). The lines look like the Chinese word "WANG".
The word means "the king of the world" in Chinese.
Most of the tigers come from China and India. Tigers are dangerous animals. They look scary
(吓人的). They like eating meat. They have yellow fur with black lines. They usually weigh about 200
to 300kg. Tigers can run fast. They run at a speed of 20 meters per second.
Some people think they are dangerous. But they don't know tigers are in danger now. There are only
20 to 30 wild South China Tigers in China and less than 300 in the world. Lots of people kill them for
their fur. We should take action to protect them.
1. Which animal does the writer think is "the king of the animals" ?
A. The elephant.
B. The lion.
C. The tiger.
D. The lion and the tiger.
2. Some black lines on the tiger's forehead look like______.
A. 王
B. 汪
C. 主
D. 丰
3. Which of the following is NOT true according to the passage?
A. Tigers like eating meat.
B. All of the tigers come from China.
C. Tigers usually weigh about 200 to 300 kg.
D. Tigers can run at a speed of 20 meters per second.
4. How many wild South China Tigers are there in China?
A. There are less than 20.
B. There are only 20 to 30.
C. There are less than 200.
D. There are less than 300.
5. Why do you think the tigers are in danger?
A. Because the tigers couldn't find enough food to eat.
B. Because lots of people kill them for their safety.
C. Because lots of people think they are dangerous.
D. Because lots of people kill them for their fur.
气管环和气管粘膜毛细血管MAP为（）
A.20mmHg
B.24mmHg
C.28mmHg
D.32mmHg
E.35mmHg
男性，80岁，6小时前晨练后突发左下腹痛，恶心未吐，2天来尚未排便，既往无大病。查体：腹胀，左下腹有压痛，未及明显肿块，肠鸣音亢进，直肠指检阴性。
对该患者的诊断和治疗有价值的措施是（）
A.扩血管药物
B.选择性动脉造影
C.钡灌肠
D.胃肠减压
E.腹部平片
按贷款风险分类法，贷款可分为（）、（）、（）、（）、（）五类。
简答决策支持系统的发展阶段。