Question

8．We've used the wind as an energy source for a long time．The Babylonians and Chinese were using wind power to pump water for irrigating crops 4，000 years ago，and sailing boats were around long before that．Wind power was used in the Middle Ages，in Europe，to grind（磨碎） corn，which is where the term"windmill"comes from．
We can use the energy in the wind by building a tall tower，with a large propellor on the top．The wind blows the propellor round，which turns a generator to produce electricity．We tend to build many of these towers together，to make a"wind farm"and produce more electricity．The more towers，the more wind，and the larger the propellors，the more electricity we can make．It's only worth building wind farms in places that have strong，steady winds，although boats and caravans（大篷车）increasingly have small wind generators to help keep their batteries charged．
The best places for wind farms are in coastal areas，at the tops of rounded hills，open plains and gaps in mountains-places where the wind is strong and reliable．Some are offshore．To be worthwhile，you need an average wind speed of around 25 km/h．Most wind farms in the UK are in Cornwall or Wales．Isolated places such as farms may have their own wind generators．In California，several"wind farms"supply electricity to homes around Los Angeles．
The propellors are large，to obtain energy from the largest possible volume of air．The blades can be angled to cope with varying wind speeds．Some designs use vertical turbines（垂直涡轮机），which don't need to be turned to face the wind．The towers are tall，to get the propellors as high as possible，up to where the wind is stronger．This means that the land beneath can still be used for farming．
66．The first paragraph aims to introduce to usD．
A．the function of wind power                
B．the source of wind power
C．the nations using wind power                        
D．the history of using wind power
67．How does a wind power work？D
A．The generator turns the propeller blades and produce electricity．
B．The tall tower helps turn the energy in the air into electricity．
C．Warm air rises and makes the propellor move round．
D．The propellor blown round by wind turns the generator to produce electricity．
68．The best places for building the wind farm are places whereD．
A．boats and caravans can often be seen         
B．isolated farms don't have enough electricity
C．there are less human activities                   
D．the wind is strong and reliable
69．We can infer from the passage thatB．
A．wind farms will not take up too much farming land
B．wind farms need no fuel because wind is free
C．the blades can be angled to turn to face the wind wherever it comes from
D．the higher and larger the towers are，the stronger the wind is
70．What can be a suitable title for the passage？B
A．Where to build a wind farm．
B．ABC of the using of wind energy．
C．How to make best use of wind．
D．Wind energy is the best energy．

Answer 1

分析 本文是一篇科教类阅读，主要介绍了通过建造"wind farms"来使用风能．

解答 66-70．DDDBB
66题答案：D考查细节推理，文章的首段是在向读者介绍人类使用风能的历史由来已久；故本题答案为D选项．
67题答案：D考查细节推理，根据文章第二段的The wind blows the propellor round，which turns a generator to produce electricity．风使螺旋桨转动，螺旋桨的转动会使发电机发电．可知本题答案为D选项．
68题答案：D考查细节推理，根据文章第二段的The best places for wind farms are in coastal areas，at the tops of rounded hills，open plains and gaps in mountains-places where the wind is strong and reliable．"wind farms"的最佳选地是在海岸地区、在圆形的山顶、开阔的平原、山区的开口等风力强且可靠的地方．可知本题答案为D选项．
69题答案：B考查细节推理，"wind farms"是靠风发电而不是燃料，而且风是免费的；故本题答案为B选项．
70题答案：B考查主旨概括，文章主要介绍了通过建造"wind farms"来利用风能的一些知识；故本题答案为B选项．

点评 本文是一篇科教类阅读，题目涉及多道细节理解题，做题时结合原文和题目有针对 性找出相关语句进行仔细分析，结合选项选出正确答案．推理判断也是要在抓住关键句子的基础上合理的分析才能得出正确的答案．