Genevieve Tauxe, a member of the research team, says it was not easy to find the neurons(神经元) of noble cells that recognize both the smell of human breath and

　　skin.“With the device used to examine the mosquito, we are able to insert a very small electrode(电极) into the part of the mosquito's nose, where its smelling neurons are and where the smell is happening，” said Tauxe.

　　Anandasankar Ray says a product based on Ethyl pyruvate may cost less to produce than DEFT，the most effective chemical treatment now in use. He says DEFT is too costly for most people who live in areas affected by malaria.

　　“Perhaps by finding smells that can attack other target receptors, we will be able to improve upon DEFT and finally have the next generation of insect behaviour control products，”said Ray.

　　5．The best title of the passage is most probably “________”．

　　A．Scientists find a new substance to fight mosquitoes

　　B．A new generation of DEET has been developed to kill mosquitoes

　　C．Malaria—a serious disease causing 630,000 deaths

　　D．Ethyl pyruvate—an insect behaviour control product

　　6．According to the passage, Ethyl pyruvate can________.

　　A．kill the mosquitoes' smelling neurons

　　B．cause the mosquitoes to lose their senses of smell

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