Today petroleum provides around 40% of the worlds energy needs, mostly fuelling automobiles. Coal is still used, mostly in pover stations, to cover one-quarter of our energy needs, but it is the least efficient, unhealthiest and most environmentally damaging fossil fuel. Natural gas reserves could plug some of the gap from oil, but reserves of that will not last into the 22nd century either. Most experts predict we will exhaust easily accessible reserves within 50 years. We could fast reach an energy crisis. We need to rapidly develop sustainable solutions to fuel our future. Less-polluting renewable energy sources offer a more practical long-term energy solution. They may benefit the worlds poor too. Renewable refers to the fact that these resources are not used faster than they can be replaced. Hydroelectric power is now the most common form of renewable energy, supplying around 20% of world electricity. Chinas three gorges Dam, which has just been completed, is the largest ever. At five times the size of the USs Hoover Dam, its 26 turbines will generate the equivalent energy of 18 coal-fired power stations. It will satisfy 3% of Chinas entire electricity demand. In 2003, the first commercial power station to harness tidal currents in the open sea opened in Norway. It is designed like windmill, but others take the form of turbines. As prices fall, wind power has become the fastest growing type of electricity generation quadrupling worldwide between 1999 and 2005. Modern wind farms consist of turbines that generate electricity. Though it will be more expensive, there is more than enough wind to provide the worlds entire energy needs. Wind farms come in onshore and offshore forms. They can often end up at spots of natural beauty, and are often unpopular with residents. And turbines are not totally benign they can interfere with radar and leave a significant ecological footprint, altering climate and lilling sea birds. Migrating birds may have more luck avoiding them. Scotland is building europes largest wind farm, which wil power 200,000 homes. The UKs goal is to generate onefifth of power from renewable sources, mainly wind, by 2020. But this may cause problems, because wind is unreliable. 1.According to the passage,which of the following is the most polluting energy resource? A.Petroleum. B.Coal. C.Natural gas D.Water. 2.Chinas Three Gorges Dam A.is the first hydroelectric dam in the world. B.is of the same size as the USs Hoover Dam. C.can generate around 3% of world electricity. D.is the largest hydroelectric dam in the world. 3.Which country took the lead in making use of tidal currents to produce power in 2003? A.The UK. B.China. C.Norway. D.The US. 4.One of the problems with wind farms is that A.there is not enough wind. B.wind is not reliable. C.they can only be built on the sea. D.they might influence the world economy. 5.According to the passage,resources like wind are A.renewable. B.recyclable. C.damaging. D.scarce. 答案 B、D、C、B、A
Al-Qaida, Taliban rift emerges
Worker wakes up without left kidney
Cracks near super tower prove unsettling
Guangdong govt vows to improve organization at grassroots level
Syrian FM urges foreign journalists to respect rules
Expats fuel demand for domestic helpers
Two girls commit suicide in pursuit of time travel fantasy
Anti-austerity protests fall flat in much of Europe
Deputy FM in Syria to urge end to violence
EU undeterred by threat on oil supply
Aussie FM resigns in leadership spat
Forced labor outlawed for people in detention
Program to champion rights of nonsmokers
At least 7 killed in Afghan Quran burning protests
Rapid-fire attacks kill 50 across Iraq
More US kids living in high-poverty areas
Self-immolation acts condemned by deputies
Flight delays decrease in 2011
Comic collection could yield serious money
Chavez 'stable' following surgery
Expats get wide range of services at new Pudong center
Bin Laden's compound demolished
Gillard says she has colleagues' strong support
'Control number of mainland births in HK'
More US films set for China
Despite ban, smoking is rampant in Internet bars
Investment to be stimulated
Elderly junkies find 'real freedom' at Dutch home
Putin's foreign policies likely to tilt toward Asia
Hearing ends without ruling over iPad name
不限 |
英语教案 |
英语课件 |
英语试题 |
不限 |
不限 |
上册 |
下册 |
不限 |