|
Renewable Energy Sources
Today petroleum (石油)provides around 40% of the world’s energy needs,
mostly fuelling automobiles. Coal is still used, mostly in power stations, to
cover one-quarter of our energy needs, but it is the least efficient,
unhealthiest and most environmentally damaging fossil fuel(矿物燃料). Natural gas
reserves could fill 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. Less polluting renewable energy sources
offer a more practical long-term energy solution. "Renewable" refers to
the fact that these resources are not used faster than they can be
replaced.
Hydroelectric(水力发电的) power is now the most common form
of renewable energy, supplying aro
A. Petroleum.
B. Coal.
C. Natural gas
D. Water.
更多"{{B}}第三篇{{/B}}
Renewa"的相关试题:
[单项选择]{{B}}第三篇{{/B}}
|
Renewable Energy Sources
Today petroleum (石油)provides around 40% of the world’s energy needs,
mostly fuelling automobiles. Coal is still used, mostly in power stations, to
cover one-quarter of our energy needs, but it is the least efficient,
unhealthiest and most environmentally damaging fossil fuel(矿物燃料). Natural gas
reserves could fill 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. Less polluting renewable energy sources
offer a more practical long-term energy solution. "Renewable" refers to
the fact that these resources are not used faster than they can be
replaced.
Hydroelectric(水力发电的) power is now the most common form
of renewable energy, supplying aro
A. is the first hydroelectric dam in the world
B. is of the same size as the US’s Hoover Dam
C. can generate around 3% of world electricity’
D. is the largest hydroelectric dam in the world
[单项选择]第三篇Renewable Energy Sources
Today petroleum(石油)provides around 40% of the world’s energy needs,mostly fuelling automobiles.Coal is still used,mostly in power stations,to cover one-quarter of our energy needs,but it is the least efficient,unhealthiest and most environmentally damaging fossil fuel(矿物燃料).Natural gas reserves could fill 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.Less-polluting renewable energy sources offer a more practical long-term energy solution.“Renewable”refers to the fact that these resources are not used faster than they can be replaced.
Hydroelectric(水力发电的)power is now the most common form of renewable energy,supplying around 20% of world electricity.China’s Three Gorges Dam is the largest ever.At five times the size of the US’s Hoover Dam,its 26 turbines(涡轮机)will generate the equivalent energy of 18 coal-fired power stations.It wil
A. Petroleum.
B. Coal.
C. Natural gas
D. Water.
[单项选择]Possible Breakthrough in Renewable Energy
Plant scientists at the University of Michigan (150) an intriguing breakthrough. They are excited about a new breed of plant that can produce very high energy yields. The plant, which is a cross-breed of corn, wheat and barley, was originally made for another (151) .
The scientists were initially trying to develop a new feed crop for cattle. While the crop was a failure as cattle feed, additional testing showed that it had excellent biofuel properties.
Currently, the crop is in the experimental stage. Scientists need to do (152) work to determine under what conditions the plant grows best. This testing will be finished soon, and the plant should be out of the laboratory and in field trials by the end of the year.
A. make
B. had made
C. have made
D. would make
[单项选择] 第一篇Renewable Energy Sources
Today petroleum(石油)provides around 40% of the world’s energy needs,mostly fuelling automobiles.Coal is still used,mostly in power stations,to cover one-quarter of our energy needs,but it is the least efficient,unhealthiest and most environmentally damaging fossil fuel(矿物燃料).Natural gas reserves could fill 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.Less-polluting renewable energy sources offer a more practical long-term energy solution.“Renewable”refers to the fact that these resources are not used faster than they can be replaced.
Hydroelectric(水力发电的)power is now the most common form of renewable energy,supplying around 20% of world electricity.China’s Three Gorges Dam is the largest ever.At five times the size of the US’s Hoover Dam,its 26 turbines(涡轮机)will generate the equivalent energy of 18 coal-fired power stations.It wi
A. Petroleum
B. Coal
C. Natural gas
D. Water
[填空题]Solar energy is called a renewable resource because on a human time scale it is essentially inexhaustible, it is expected to last at least 6.5 billion years while the sun completes its life cycle. 46) A potentially renewable resource can be renewed fairly rapidly (hours to several decades) through natural processes, examples of which include forest trees, grassland grasses, wild animals, fresh lake and stream water, groundwater, fresh air, and fertile soil.
47) One important potentially renewable resource for us and other species is biological diversity or biodiversity, which consists of the life forms that can best survive variety of conditions currently found on Earth. Kinds of biodiversity include (1) genetic diversity( variety in the genetic makeup among individuals within a single species), (2) species diversity (variety among the species or unique forms of life found in different habitats of the planet), and ( 3 ) ecological diversity (variety of forests, deserts, grasslands,
购买搜题卡查看答案
[会员特权] 开通VIP， 查看 全部题目答案
[会员特权] 享免全部广告特权
请选择支付方式
-
微信支付
-
支付宝支付
立即支付
系统将自动为您注册账号
请使用微信扫码支付
截图扫码使用小程序[完全免费查看答案]
请不要关闭本页面，支付完成后请点击【支付完成】按钮
恭喜您，购买搜题卡成功
重要提示：请拍照或截图保存账号密码！
我要搜题网官网：https://www.woyaosouti.com
我已记住账号密码
| |
