[填空题]Governments with renewable energy policies usually set ______ for renewable energy use.

[简答题]renewable sources of energy

[单项选择]Insurance policies usually contain a (56) clause that excludes a fixed amount of the loss from (57) Casualty insurance policies frequently contain a coinsurance clause in the contract. A coinsurance clause provides that the insurance company shall be liable (58) only a portion of any loss (59) by the insured unless the insured carries insurance which totals a certain percent, frequently 80-90 percent of the fair value of the asset. In the (60) of a loss, the insured recovers from the insurance company that portion of the loss which the face of the insurance policy bears to the amount of insurance that should be carried as required by the coinsurance clause.
A. deductible B. exemptible C. expectable D. escapable

[单项选择]

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 22^nd 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
A. Petroleum
B. Coal
C. Natural gas
D. Water

[单项选择]What hinders the extensive use of renewable energy sources
A. Lack of advanced storing technology.
B. A need for joint efforts of scientists.
C. A shortage of practical support from the public.
D. An unreliable market demand.

[单项选择]

 

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 22^nd 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 eve
A. The UK
B. China
C. Norway
D. The US

[单项选择]

 

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 22^nd 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 la
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]Cheerleaders for renewable energy are fond of pointing out that patches of desert receive enough energy each year from sunlight to power the entire world. But few could explain how the construction of the millions of solar cells required to convert that energy into electricity would be financed. Public utility bosses and policymakers tend to dismiss wind and solar power as noble but expensive distractions, sustainable only through huge subsidies. But new studies suggest that renewables might not be as dear as skeptics suspect.
In a report that was due out on July 6th, Greenpeace, an environmental group, argues that public utilities would save money by investing in renewables. Windmills may cost more to build, the logic runs, but they do not require the purchase of fuel, unlike coal or gas-fired power plants. Those future fuel costs, Greenpeace says, massively outweigh the extra investment costs of renewables. If nuclear power were phased out and renewables’ share of electricity ge
A. are optimistic about the finance of the solar power construction.
B. could hardly explain how solar cells convert sunlight into electricity.
C. in general ignore the cost of the solar power construction.
D. suspect that solar cells in desert are expensive.

[单项选择]
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 22^nd 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
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.