题目内容
Plastic is one of the most important technological discoveries of the 20th century．However．it may soon be replaced．The new development――liquid wood――can replace plastics in a11 branches of modern―day industries．
Plastic as a material enjoys the biggest demand in the modern world，but it does have a number of drawbacks．First and foremost，plastic isn’t recyclable．Secondly，it contains toxins(毒物)helping develop cancerous diseases．Finally，it's made of oil and oil reserves aren’t endless．
The liquid wood technology is likely to replace plastic and providing mankind with new materials for many years ahead．Norbert Eisenfreich．a senior researcher at the Faunhofer Institute for Chemical Technology in Germany(ICT)，said that arboform，the new material，is made of lignin(木质素)，which can be obtained from soft tissues of wood．Once mixed with several other materials，it turns into solid and nontoxic alternative for plastics．
ICT team leader Emilia Regina Inone――Kauffmann said the wood-working industry separates wood into three basic components，including lignin．Lignin isn’t used for the production of paper．Specialists of ICT mixed lignin with several natural materials and thus invented the material which could be melted(熔化)and molded(铸型)．
When solid，arboform looks like plastic and possesses the qualities of polished wood．It can be used for the production of any items．Arboform is already used for the production of car parts which require extra strength．In addition，liquid wood can be recycled repeatedly．he material preserved all of its qualities even if it’s reprocessed ten times．
However，the new invention doesn’t enjoy an extensive use due to the high content of sulphur(硫)in it．German researchers are sure to reduce the amount of sulphur by 90 percent very soon to make arboform usable for ho，me needs．
7 1．According to the passage，plastics ．
A．does harm to our society in some way
B．helps to protect our environment in some way
C．has been replaced by the newly discovered material
D．helps US to reduce the use of petrol
72．The underlined word“alternative”in Paragraph 3 refers to ．
A．hgnin or arboform B．plastics
C．mixture of several materials D．soft tissues of wood
73．What’s the advantage of arboform over plastic?
A．It is easier made from natural oil．
B．It is more widely used in household．
C．It is recyclable and friendly to environment．
D．It contains no poisonous materials．
74．It can be concluded that German researchers will focus their future work firstly on ．
A．the material’s extensive use B．the content of sulphur in arboform
C．the production cost of arboform D．the qualities of liquid wood
75．The main purpose of the text is to ．
A．advertise the new material――arboform
B．introduce liquid wood which will replace plastic
C．advertise new products made of arboform
D．show readers how to produce arboform
ACCBB
名校课堂系列答案
.Have you ever stayed in a hotel? Most Chinese hotels often provide guests with things like disposable (一次性的) toothbrushes, toothpaste, shampoo and slippers. Many guests like the idea because they don't have to bring their own. But, if you travel to Beijing, remember to bring your own things. Starting from June, some hotels in Beijing will no longer provide guests with these disposables. They want to ask people to use less disposable things.
Many disposable things are made of plastic(塑料). People throw them away after only using them once. It is a waste of natural resources and is very bad for the environment. Do you know, one Chinese person makes as much as 400kg of waste a year! Most of that waste comes from disposable things. In Beijing, people throw away about 19,000 tons of plastic bags and 1,320 tons of plastic lunch bowls every year! Plastic can take between 100 and 400 years to break down. So the less plastic we throw out, the better. So, wherever you travel, bring your own things and use them again and again.
Back at home and school, you can also do something to make our world a better place. Try to do these things in your daily life:
Use cloth shopping bags, not plastic ones.
After using a plastic bag, wash it out and let it dry. Then you can use it over and over again.
Do not use paper cups. At your school canteen(食堂), use your own bowl and chopsticks instead of disposable ones.
【小题1】Why do many hotels provide guests with some disposable things?
| A．Let their guests be convenient during their travelling. |
| B．Hope their guests use less disposable things. |
| C．Wish their guests to save money. |
| D．Want their guests to use more disposable things. |
| A．cheap food and drink | B．disposable things |
| C．good service | D．free TV programs |
| A．Many disposable things are made of plastic. |
| B．Throwing disposable things away is a waste of natural resources. |
| C．Plastic is very bad for the environment. |
| D．Plastic breaks down easily. |
| A．Use shopping bags made of plastic. |
| B．Do not throw away paper cups. |
| C．Use disposable plates, bowls and chopsticks. |
| D．Do not forget to reuse daily necessities(日用品). |
| A．people don't like disposable things at all |
| B．we can't use paper or plastic bowls at school |
| C．we should use less plastic things and protect our environment |
| D．hotels won't provide disposable things because they want to save money |
Plastic is one of the most important technological discoveries of the 20th century. However, it may soon be replaced. The new development- liquid wood- can replace plastics in all branches of modern-day industries.
Plastic as a material enjoys the biggest demand in the modern world, but it does have a number of drawbacks. First and foremost, plastic isn’t recyclable. Secondly, it contains toxins (毒物) helping develop cancerous diseases. Finally, it’s made of oil and oil reserves aren’t endless.
The liquid wood technology is likely to replace plastic and providing mankind with new materials for many years ahead. Norbert Eisenfreich, a senior researcher at the Faunhofer Institute for Chemical Technology in Germany (ICT), said that arboform, the new material, is made of lignin(木素质）, which can be obtained from soft tissues of wood. Once mixed with several other matenals, it turns into solid and non-toxic alternative for plastics.
ICT team leader Emilia Regina Inone-Kauffmann said the wood-working industry separates wood into three basic components, including lignin. Lignin isn’t used for the production of paper. Specialists of ICT mixed lignin with several natural materials and thus invented the material which could be melted and molded (铸型）.
When solid, arboform looks like plastic and possesses tho qualitie of polished wood. It can be used for the production of any items. Arboform is already used for the production of car parts which require extra strength. In addition, liquid wood can be recycled repeatedly. The material preserved all of its qualities even if it’s reprocessed ten times.
However, the new invention doesn’t enjoy an extensive use due to the high content of sulfur(硫) in it. German researchers are sure to reduce the amount of sulfur by 90% very soon to make arboform usable for home needs.
【小题1】According to the passage, plastic_______.
| A．helps us to reduce the use of petrol |
| B．helps to protect our environment in some way |
| C．does harm to our society in some way |
| D．has been replaced by the newly discovered material |
| A．It is easier made from natural oil. |
| B．It is more widely used in household |
| C．It is recyclable and friendly to environment. |
| D．It contains no poisonous materials. |
| A．lignin or arboform | B．soft tissues of wood |
| C．plastics or wood | D．mixture of several materials |
| A．the material’s extensive use | B．the content of sulfur in arboform |
| C．the production cost of arboform | D．the qualities of liquid wood |
| A．introduce liquid wood which will replace plastic |
| B．show readers how to produce arboform |
| C．advertise the new material-arboform |
| D．advertise new products made of arboform |