You may never connect the words “good and “eco-friendly with plastic.It’s time to do a rethink on that as we say hello to hempplastic.Traditionally,plastics have been made from petrochemicals,which 题目和参考答案——青夏教育精英家教网—

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You may never connect the words “good” and “eco-friendly”with plastic.It’s time to do a rethink on that as we say hello to hemp(大麻)plastic.Traditionally,plastics have been made from petrochemicals,which are mainly poisonous.Plants,on the other hand,are also a source of cellulose(纤维素),which can be used to make biodegradable (生物所能分解的)plastic.As hemp happens to be one of the richest sources of cellulose,it is only natural that scientists will support its use,considering its ecological benefits.
Hemp plastic is biodegradable and recyclable.If you thought being eco-friendly reduced its solidity,you couldn’t be more wrong.The hard level of hemp plastic can match that of regular plastic.Hemp plastic is resistant to heat;however,the most outstanding feature of a few varieties of hemp plastic is that they are flame resistant too.Finally,if Henry Ford could imagine creating a car with this material,we can perhaps believe that it indeed is“ten times stronger than steel”.
It is a pity that with so many useful qualities,we don’t see hemp plastic being used in our everyday life,the way it ought to be.Hemp plastic can easily take the place of the exiting plastic in products like cell phone chargers(充电器),laptop covers,etc.Currently,hemp plastic is being used to produce audio(音响设备),video,toys,automobile parts and packaging materials.
Hemp fiber is one of the strongest natural fibers known to us.As scientists keep looking for ways to solve the ecological damage that traditional plastics have caused,here is a material that can be produced to be 100% biodegradable.Hemp plastic is known to be several times durable as compared to polypropylene(聚丙烯)plastic,and it comes without all the health and safety threats,It really has long useful life.
Plastics keep reminding us of the damage that we have done to our planet,all under the excuse of convenience.As hemp products have become a new choice into our daily life,Please take a green plan now and make your effort to protect the environment.
小题1:Plastics produced in the traditional way are______.

A．harmful	B．made from plants
C．good and eco-friendly	D．biodegradable

小题2:According to Para.2,hemp plastic_____.

A．is all resistant to flame	B．doesn’t have enough solidity
C．will take the place of steel	D．can be used again after being processed

小题3:What does the underlined word“durable”mean in Para.4?

A．Very useful of important.

B．Costing little money or less money.

C．Staying in good condition for a long time.

D．Existing in large numbers or in many places.

小题4:Which aspect of hemp plastic isn’t mentioned in the passage?

A．Features.

B．Production cost

C．Applications.

D．Advantages.

小题5:What can we know from the passage?

A．Using hemp plastic is inconvenient.

B．People haven’t made the most of hemp.

C．Hemp fiber is a kind of strong man-made fiber.

D．Scientists have already known how to solve ecological damage.

小题1:A
小题2:D
小题3:C
小题4:B
小题5:B

试题分析：
小题1:这是细节理解题。根据Traditionally,plastics have been made from petrochemicals,which are mainly poisonous.故选A。
小题2:这是细节理解题。根据the most outstanding feature of a few varieties of hemp plastic is that they are flame resistant too.并非所有的都耐火，故排除A；根据If you thought being eco-friendly reduced its solidity,you couldn’t be more wrong.故排除B；文中只是说了它的硬度有时比钢还硬，但并没有说它要代替钢，故排除C；根据Hemp plastic is biodegradable and recyclable.故选D。
小题3:这是细节理解题。根据it comes without all the health and safety threats,It really has long useful life.这里说的是Hemp plastic比polypropylene(聚丙烯)plastic的寿命长。故选C
小题4:这是细节理解题。根据the most outstanding feature of a few varieties of hemp plastic is that they are flame resistant too.故排除A；根据第三段可以排除C；根据As hemp happens to be one of the richest sources of cellulose,it is only natural that scientists will support its use,considering its ecological benefits.及全文来看，一直在说Hemp plastic的好处，故排除D，所以应选B。
小题5:这是细节理解题。根据As hemp happens to be one of the richest sources of cellulose,it is only natural that scientists will support its use,considering its ecological benefits.及全文来看，Hemp plastic还没有广泛应用到日常生活中。故选B
点评：本文介绍了麻塑料的利用价值，它对于人们的生活和生产都能带来益处，对于人们的生存环境也是有好处的。这样的说明性文章一般都主旨鲜明,很容易在文中找到答案。做题时要注意文章的首段和每一段的首句或尾句，因为它们往往就是文章的主题句。

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