题目内容

【题目】你班本周班会主题:你认为目前什么环境问题最严重？请你根据班会上的讨论内容写一篇文章发表在你校网站上。文章的首句已给出，字数：120字左右。

最严重问题：全球变暖；

原因：汽车尾气、工业排放废气、森林被破坏等；

后果：气温升高，雨水增多，海平面升高，陆地被淹没，影响动植物等；

解决办法：鼓励人们使用自行车，净化空气，多种植树木等。

The most serious environmental problem — global warming

There are many big environmental problems facing us on the earth today, but I think the most serious one is…

_______________________________________________________________________

_______________________________________________________________________

_______________________________________________________________________

_______________________________________________________________________

_______________________________________________________________________

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【答案】

The most serious environmental problem

—global warming

There are many big environmental problems facing us on the earth today, but I think the most serious one is global warming. Global warming means an average increase in the earth’s temperature. It is caused by gases from cars, waste gases from factories, destruction of forests, and so on. Global warming will cause changes in climate. A warmer earth may lead to more rain and the rising of the sea level. In this case, some land will be flooded and also it will have a bad influence on both human beings and wildlife.

So, how to solve the problem of global warming is really urgent for human beings. What can we do? First of all, people should be educated to raise the awareness of environmental protection. Also, we should call for people to take action and encourage people to use bicycles instead of cars and clean poisonous gases before they come out of factories. Besides, we should plant more trees. If we try our best to take better care of the earth, we will make our world a better place.

【解析】

试题分析：本文是一篇提纲类作文，要求根据所给的提示内容写一篇文章。根据提示的信息可知，内容包括：污染的原因，后果等几个方面。本文是一则通知，所以用第一人称，以一般现在时为主。写作时要充分发挥想象，适当的添加自己的观点，使文章内容丰满，并达到要求的字数。此外为了提高文章档次，还要注意使用多种句式和高级词汇，并添加关联词让行文流畅。

【亮点说明】本篇书面表达使用了两段式结构，开门见山地点明了环境问题和全球变暖问题；第二段说明了我们应该采取的措施然后发出号召。本文的亮点是运用了恰当的关联词，如besides等让文章衔接自然；句式try one's best、Also...和定语从句等结构的运用也为文章增添了亮色。

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【题目】How do people traditionally manufacture (制造) things? They usually start with a sheet of metal, wood or other material and cut, drill (钻) and shave it to create a desired shape. Sometimes, they use a mold (模具) made of metal or sand, pour liquid plastic or metal into it and let it cool to create a solid part.

Now, a completely different method is gaining popularity.

On Oct. 9, 2013, London Science Museum kicked off its new exhibition, 3-D: Printing the Future, with over 600 3-D printed objects on display, including space probes (探测器), toy dolls and even human organs – basically any product you can think of, reported Live Science.

You might find it hard to believe that an object can actually be “printed out” like a picture. But it is not that hard to understand how it works. Just as a traditional printer sprays (喷洒) ink onto paper line by line, modern 3-D printers spread material onto a surface layer by layer, from the bottom to the top, gradually building up a shape.

Instead of ink, the materials the 3-D printer uses are mainly plastic, resin (树脂) and certain metals. The thinner each layer is – from a millimeter to less than the width of a hair – the smoother and finer the object will be. And objects always come out in one piece, sparing you the trouble of putting different parts together afterward.

For example, 10 years ago a desktop 3-D printer might have cost ￡20,000 (200,000 yuan), while now it costs only about ￡1,000, according to the BBC. In fact, 3-D printers have been around for some time, but until recently they hadn’t been very popular since few people could afford them. Last year, though, saw a big decrease in the price of 3-D printers.

However, as 3-D printing technology becomes more commonplace, it may trigger certain problems. One of them is piracy (盗版). “Once you can download a coffee maker, or print out a new set of kitchen utensils (餐具) on your personal 3-D printer, who will visit a retail (零售的) store again?” an expert on 3-D printing told Forbes News.

Even more frightening, the world’s first 3-D printed gun was successfully fired in the US in May of this year, which means that 3-D printing could potentially give more people access to weapons.

【1】According to the article, in the future, 3-D printing technology will probably ______.

A. change the way people make products

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C. forbid many countries to make purchases of weapons

D. take the place of normal printers and save lots of energy

【2】What was the big event that happened in the 3-D printing industry last year?

A. Over 600 3-D printed objects were on display in an exhibition.

B. 3-D printing technology came to be used in various fields.

C. The world’s first 3-D printed gun was successfully made.

D. The 3-D printer became more affordable for consumers.

【3】What is the author’s attitude toward 3-D printing technology?

A. Amused. B. Objective.

C. Supportive. D. Negative.

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