LOSANGELES（Reuters）---Onionsmakeyoucry，addflavortofoodandaretalkedaboutalotfortheirmedicinalbenefits．Nowthevegetablehasanotheruse---poweringupgreenenergy．AnewsystemdebutsonFridaythatchangesonionjuiceinto

Question

LOS ANGELES （Reuters）---Onions make you cry，add flavor to food and are talked about a lot for their medicinal benefits．Now the vegetable has another use---powering up green energy．
A new system debuts on Friday that changes onion juice into electricity at Gills Onions，the largest fresh onion processor （加工机） in the United States．
The Oxnard，California-based company expects its new onion-fueled power to reduce its electric bill by﹩700，000 a year and cut its annual greenhouse gas releasing by up to 30，000 tons．The happy ending to this green energy tale，however，generated another question：how to get rid of onion waste．"When we peel an onion，35 to 40 percent of the onion comes off before we have a usable onion．That's the top，tail and skins around the onion before you get to the meat，"said Steven Gill，co-owner of the 25-year-old company．
They used to take the waste to the fields for composting （堆肥） but that became a problem as it cost too much．Ten years ago，Gill started looking at technology for a solution．"We ended up destroying the skins as they c ome out of the plant and extracting all the juice，which is very high in sugars，and bacteria love it，"Gill said．
In the new system，bacteria produce methane gas（沼气） from the juice．The gas then goes to two 300 kilowatt fuel cells，creating enough power for 460 homes．The company expects to get 35 to 40 percent of its electricity from this new system．
The company invested﹩9.5 million in the project and will receive﹩2.7 million from Southern California Gas Co．，a regulated subsidiary of Sempra Energy，as part of a state program to encourage self-contained generation by businesses．In addition to cutting its electric bill，the company will save﹩400，000 in costs of taking the waste to the fields and expects pay-back in six years．
The onion grower now has a new goal：to be a zero-waste facility by 2013．
"We wanted to follow it all the way through and make the full circle，"Gill said．

41．What would be the best title for this passage？___
A．Onions are made use of in America now
B．US company finds a new way to reduce costs
C．Onions are widely used to produce electricity now
D．US company turns onion juice into electricity
42．According to the passage，we can learn that in the past___．
A．onion waste was a problem for most people
B．a big part of an onion was wasted
C．onions were mainly used as medicine
D．onions were not liked by most people
43．In the new system，onions can be used to produce electricity mainly because___．
A．the skins of onions can be destroyed easily
B．the onion waste is taken to the fields
C．a lot of bacteria are put into onions
D．bacteria can produce methane gas from onion juice
44．It is implied in the passage that___．
A．every family can use onions to produce electricity
B．this new technology is not well received by some people
C．onions have played the most important role in producing power
D．using onions to produce electricity will help reduce pollution
45．In which part of a newspaper would you most probably read this passage？___
A．Science    B．Education   C．Health   D．Agriculture．

Answer 1

41-45  DBDDA
41题答案是D．文章大意题．根据A new system debuts on Friday that changes onion juice into electricity at Gills Onions，the largest fresh onion processor （加工机） in the United States．可知美国有系统可把洋葱进行加工，转化为电力．故选D．
42题答案是B．细节理解题．根据"When we peel an onion，35 to 40 percent of the onion comes off before we have a usable onion．"可知洋葱35%-40%的部分都被浪费掉．故选B．
43题答案是D．细节理解题．根据In the new system，bacteria produce methane gas（沼气） from the juice可知新系统中，细菌能从洋葱粒生产沼气．故选D．
44题答案是D．推理判断题．根据The onion grower now has a new goal：to be a zero-waste facility by 2013．
"We wanted to follow it all the way through and make the full circle，"Gill said．洋葱可以做到零浪费，循环使用，暗指洋葱不污染环境．故选D．
45题答案是A．推理判断题．生产加工洋葱是科学技术发展的成果，应该发表在科学类报刊上．故选A．