填空题 According to the World Health Organization, malaria, a disease spread by mosquitoes, affects millions of people every year. Everyone knows h (76) irritating the noise made by a mosquito, accompanied by a painful reaction to its bite, can be. It is ast (77) that so little is known about why mosquitoes are drawn to or driven away from people, given the level of distress and disease caused by these insects. We know that the most effective ch (78) for protecting people against mosquitoes is diethyholuamide, commonly shortened to DEET. Al (79) DEET works well, it has some serious drawbacks: it can dam (80) clothes and some people are allergic to it.