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题型:阅读理解-阅读单选 难度:0.85 引用次数:103 题号:12555123

Most people don't think too much about chemicals, but actually they are all around us. Many substances consist of chemicals, including the air that we breathe and the water that we drink. Some chemicals are natural, but most of them are artificial and may be harmful to the human body.

In 2005, Hurricane Katrina struck the United States, so displaced people had to move into temporary housing. Later, some of them began experiencing headaches and nosebleeds due to Formaldehyde exposure. This chemical is commonly found in the glue that holds many household products. It was proved to cause cancer in 2011 and has been linked to an increase in allergies it children.

However,there is another choice: natural adhesives(黏合剂). In particular, one is made from plants such as soy(豆类)proteins that have been changed to resemble the protein some shellfish use to stick to rocks. A natural adhesive is now widely used in wood products in the U.S. Other companies are also developing more natural alternatives to replace industrial chemicals. This is a part of the Green Chemistry philosophy.

Green Chemistry is a way of rethinking how to develop products and processes that are more environmentally-friendly and better for people's health. That includes reducing processing waste, using renewable materials. The 12 Principles of Green Chemistry lay out the goals of this approach. The first is prevention. It is better to prevent waste than to treat it or clean it up. Another principle encourages less dangerous chemical synthesis(化合). Chemical reactions should be designed to be as safe as possible. Energy efficiency is encouraged as well as using chemicals made from renewable plant-based sources.

There are challenges in meeting and holding to the principles of Green Chemistry, but this will encourage new research and lead to the discovery of new chemistry.

1. Why does the author mentioned the incident that happened in 2005?
A.To make comparisons.B.To prove a point.
C.To introduce a chemical.D.To bring in the topic.
2. What are natural adhesives made of?
A.Wood from treesB.Proteins from shellfish
C.Processed plant proteins.D.Melted special rocks
3. What is Paragraph 4 mainly about?
A.The definition and purpose of Green Chemistry
B.How to make environmentally. friendly products
C.Ways to reduce the amount of waste in daily life
D.Reasons for promoting Green Chemistry in the world.
4. What is the author's opinion on Green Chemistry?
A.Wonderful but impractical
B.Challenging but inspiring
C.Admirable and popular.
D.Complex and discouraging
2021·黑龙江大庆·一模 查看更多[2]

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【推荐1】We often wake up in the middle of the night with our mouths feeling dry even if we have drunk some water before going to bed. Feeling thirsty in the middle of the night has something to do with a lack of water.     1    

First of all, take a good look at how many glasses of water you’ve really drunk during the day.    2     We bet that the eight glasses must include sugared sodas, coffee and tea as well. These drinks actually don’t give the body enough water. Besides this, the caffeine in coffee causes you to go to the toilet more often.     3     So, there’s a bigger chance of you waking up thirsty in the middle of the night.

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