2019年公共英语二级阅读理解练习题（14）

Picture the scene: the battery on your mobile phone has run out. You can’t make any calls for help and no one can contact you. You are all alone - well, not quite. Just reach into your pocket and take out a piece of sugar.Put it into the battery, wait a minute, and you’re back on the phone.

Thanks to a couple of American scientists, this situation could become real.Swadesh Chaudhuri and Derek Lovely have invented the"bacteria battery" - powered by bacteria that eats sugar and turns it into electricity.

"This is a special organism," Lovely said."You can harvest enough electricity to power a cell phone battery for about four days from a spoonful of sugar."

In the past, bacteria batteries have been expensive and not long-lasting. But this battery uses more efficient bacteria that can turn 80 percent of sugar into electrical energy. This is 30 percent more than similar batteries can manage.

The bacteria battery could become as small as a household battery. It’s also cheap and stable, as sugar can be taken from waste and crops.

But the sugar to electricity process is slow: it could take weeks for the bacteria to digest a cup of sugar.And it produces "greenhouse" gases which pollute the environment.

The scientists understand there is a lot more work to be done. "It is still young," said Lovely."Where we are now is where solar power was 200r 30 years ago."

But he believes the battery could be used in scientific equipment at the bottom of the ocean.Other ideas include using sugar in the blood to run medical devices in the human body, and taking sugar from animal waste to provide energy to power homes in rural areas.

小题1:This passage is mainly about_ .A.how to change sugar into electricity

B.a scientific invention of a new kind of bacteria battery

C.a new way to reduce pollution caused by mobile phones

D.a new kind of mobile phones and its future

小题2:Which of the following is not the strong point of the newly-developed battery?A.Convenient.B.Stable.C.Inexpensive.D.Quick.

小题3:The underlined sentence in the 7th paragraph actually means .A.the bacteria battery shares some similarities with solar energy

B.scientists will continue their work until they find solar power

C.there is much room for the improvement of the bacteria battery

D.the bacteria battery will get popular in 20 0r 30 years

小题4:According to the passage, who will find the bacteria battery less useful?A.Farmers.B.Divers.C.Doctors.D.Electricians.

　　参考答案及解析

小题1:B

小题2:D

小题3:C

小题4:D

试题分析: 还在为手机里电池不够用而烦恼吗?现在科学家发明了一种会“吃糖”的电池，它可以将糖转化成电能。

小题1:B。主旨大意题。通读文章发现，文章主要介绍一种会“吃糖”的电池，它将糖转化成电能。故选B。

小题2:D。细节题。根据第六段But the sugar to electricity process is slow: it could take weeks for the bacteria to digest a cup of sugar.可知将糖转化成电能的过程比较慢，故选D。

小题3:C。根据上下文猜测句子含义。The scientists understand there is a lot more work to be done.根据第七段划线句子前文可知，因为电池的不完美，科学家认识到还有很多工作要做。 故选C。

小题4:D。推理判断题。因为细菌电池将糖转化成电能的时间很长，还会产生二氧化碳。A. Farmers农民B. Divers司机C. Doctors医生D.Electricians电工，电气专家。比较四个答案，其中电工最有可能不看好这种电池。故选D