Across countryside, non-food crops are growing alongside wheatSome are used in new altern

Across countryside, non-food crops are growing alongside wheat．Some are used in new alternatives to plastics and other materials, but others will simply be burned．
Burning crops is becoming more popular because it is good for the planet．Doing so is also cheaper than burning fossil fuels．As more land is devoted to non-food crop production, the economics of crops for fuel are likely to become even more favorable．
Humans have been burning such biomass—organic materials from plants or animals— since they discovered fire．But that burning fossil fuels could have catastrophic consequences has brought biomass back into fashion．
Even allowing for emissions (排放) of carbon dioxide from fuel used in planting, harvesting, processing and transporting biomass fuel, replacing fossil fuel with biomass can typically reduce greenhouse gas emissions by more than 90 percent．
Power stations around the world are experimenting with forms of biomass to add to their coal or oil, with encouraging results．Indeed, power companies could profit by turning to biomass, especially when the subsidies (补助) many governments offer for using renewable energy are taken into account．
Farmers can benefit from growing biomass．In Europe, the reduction of subsidies for certain crops is exposing farmers to market forces．Instead of being paid for whatever they produce, farmers must seek a clear demand for their product．Many believe that the demand for alternatives to fossil fuels could be just such a driver．
But while biomass offers a variety of potential alternatives, the world's infrastructure (基础设施） has developed around burning fossil fuels to such a stage that switching to biomass involves a change in conception that many companies have not accepted．
Also, there are problems with using biomass．Although most coal-fired power stations could take a small amount of their fuel from biomass without significant adjustment, few are built to run on biomass alone．Burning some forms of biomass also causes environmental problems．Oils and waste can be smelly, while wood produces smoke unless burned properly．
The supply chains for fossil fuels are set up well, but those for biomass are just the beginning. Sources of supply for biomass rely on farm production and can therefore be less reliable. They are necessarily limited and it wouldn't make sense to turn a very large amount of valuable agricultural land away from food crops．But as the world adjusts to the need to control greenhouse gas emissions, these problems may receive more attention．
【小题1】What do we know about biomass?A．It is a useful way of burning crops．B．It is plant and animal matter used to provide power．C．It is a new alternative to be used widely．D．It is a popular approach to fighting against pollution．【小题2】What are the advantages of using biomass?
a．It gives off less greenhouse gases．
b．It helps farmers receive subsidies for what they produce．
c．It has met the clear demand for energy．
d．It has brought subsidies for some power companies．
e．It is cheaper than burning fossil fuels．A．a, b, cB．b, c, dC．c, d, eD．a, d, e【小题3】For coal-fired power stations, ．A．more effective ways to use biomass have been triedB．using renewable energy has become their daily taskC．burning biomass alone would require considerable changesD．setting up dependable supply channels needs governments' support【小题4】What is the author's attitude towards biomass fuels?A．Defensive．B．Doubtful．C．Negative． D．ObjectiveB

(答案→)B 解析：文章讲述了生物质能的好处及其生物质现在并没有得到广泛运用的原因，同时作者相信在不久的将来肯定能够解决这些问题，它会被广泛的运用。【小题1】细节题。从文章Humans have been burning such biomass—organic materials from plants or animals可知，生物质能是一种燃烧植物或是动物来获取能量的东西，故选B【小题2】细节题。从文章Doing so is also cheaper than burning fossil fuels．；biomass can typically reduce greenhouse gas emissions by more than 90 percent． ；Farmers can benefit from growing biomass．In Europe, the reduction of subsidies for certain crops is exposing farmers to market forces可知生物能的好处是便宜，排放温室气体少，能够获得政府的补助，故选D【小题3】细节推断题从Although most coal-fired power stations could take a small amount of their fuel from biomass without significant adjustment,及倒数第一，第二段可知，依靠煤发电的电厂如果用生物质能的话需要相当大的改变，故选C【小题4】推断题。从全文来看，作者并没有推崇也没有反对这种能源，只是非常客观的态度说明了它的使用情况，故选D

这个问题我还想问问老师呢