科目:初中英语 来源:不详 题型:完形填空
We are now living in the modern society. Most of the energy we use for heating, lighting, transportation and manufacturing (制造业) comes from fossil (化石) fuels. These are carbon-based fuels from oil, coal and natural gas. When we burn these fuels we release heat which p__小题1:
___ the energy.小题2:
___ Effect. When we burn fossil fuels they produce carbon dioxide which causes global warming. Secondly, when we have used up all our coal, oil and natural gas, we will have n__小题3:
__ left to burn. Thirdly, they are not very efficient. The internal combustion engine (内燃机) that we use in most cars, trucks and buses, for example, is only about 14% efficient.小题4:
__ surface is water and water is made of hydrogen and oxygen. There is an almost unlimited supply of hydrogen. Secondly, burning hydrogen does not cause global warming. Thirdly, it is much more efficient than carbon-based fuels.小题5:
___, and there is the difficulty of storing it. It can be stored under pressure but high pressure tanks are far from safe. It can also be stored as a liquid but only at extremely low temperatures. It seems likely, therefore, that there will have to be a completely new technology before hydrogen replaces fossil fuels. S__小题6:
___ these problems is an urgent (急迫的) matter. Although China, India and Australia have huge amounts of cheap coal, and there are still l__小题7:
___ oil and gas reserves(储藏量) elsewhere, the effects on the planet’s climate will be bad if they are used.查看答案和解析>>
科目:初中英语 来源:不详 题型:完形填空
Today, there are plenty of opportunities(机会) to get to know people from otherc 小题1:
. Don’t just stare at your shoes, go and say “Hi”. These ice-breakers will help you get through the embarrassing(尴尬的)moments:小题2:
in Britain is unpredictable (不可预测的), so, it’s one of the topics the British talk a lot about. And there’s a s 小题3:
rule about weather conversation: just say, “Yes” whether you agree with the person’s idea on the weather or not. That’s because the British s 小题4:
a conversation using the weather so that they can find common ground and move on to something else.小题5:
holiday?” To get close to a French student, the safest way is to ask about his or her l 小题6:
holiday. French students enjoy a 10-to-15-day holiday every two months. And the French are famous for their conversations over a cup of coffee. Then, all you need to do is keep your ears o 小题7:
when the conversation starts.小题8:
. They go to see movies, visit friends’ houses or go shopping. S 小题9:
“What did/will you do on the weekend?” is a good way to turn the conversation on and get to know more about your new f 小题10:
.查看答案和解析>>
科目:初中英语 来源:不详 题型:听力题
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