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30.What can be inferred from Holt Lunstad's words?A.Social isolation can be solved on one's own.B.Social anxiety holds back personal interactions.C.The absence of social support worsens loneliness.D.Tight working schedules lead to tense relationships.31.What might be written in the following paragraph?A.The causes of loneliness.B.The effects of loneliness.C.The definition of loneliness.D.The solutions to the loneliness.DThey are so small that you need a microscope to see them,but so powerful that experts predict theycould kill ten million people per year worldwide by the year 2050.They are superbugs-drug-resistantbacteria that have emerged since antibrotics revolutionized medicine Indeed,the rise of thesesuperbugs and the use of antibiotics are closely connected.All organisms change over time.Smaller organisms,such as bacteria,are able to evolve more quickly,adapting as circumstances require.Facing antibiotics,bacteria have adapted with deadly efficiency.When apatient takes antibiotics to fight off a bacterial infection,the goal is to kill the bacteria causing the infection.However,although most of the bacteria are killed,a few of the strongest bacteria survive.Thus,only thesedrug-resistant bacteria are able to reproduce.This sets up a cycle and eventually results in the developmentof superbugs-bacteria able to resist even the most powerful drugs.Scientists believe that a large part of this cycle is preventable.One recent study suggested that almost50%of all antibiotic use is inappropriate or unnecessary.Some patients are prescribed (antibioticsfor illness that would eventually clear up on their own.In addition,some patients don't finish their courseof medication,allowing bacteria to bounce back,but stronger.All of these factors contribute to the rise andspread of superbugs.Another major factor that promotes the spread of drug resistance is the use of antibiotics forlivestock().In the United States,80%of antibiotic use is for animals.Partially,the drugs are used toprevent the spread of infection among animals.However,farmers also use antibiotics to help animals togain weight quickly.Unfortunately,such use is problematic because it kills off the beneficial bacteria,leaving drug-resistant strains of bacteria to thrive.What can be done to preserve antibiotics for future generations?Scientists maintain that as individuals,we can make a difference with simple steps,such as regular hand washing.It is also important that patientsunderstand that antibiotics aren't always the right course of treatment.Finally,it is crucial to takeantibiotics out of the food chain.Fortunately,consumers are pushing for this,so we are likely to seechanges in the near future.32.According to the passage,what are superbugs?A.Effective and revolutionary antibiotics.B.Small but powerful drug-resistant bacteria.C.Tiny organisms found under a microscope.D.Bacteria that could harm animals and humans.33.What probably contribute(s)to the rise and spread of superbugs?A.The antibiotics for illness.B.Some infected animals.C.Patients'awareness of treatment course.D.The misuse of antibiotics.34.What's the author's attitude towards the future of stopping superbugs?A.Indifferent.B.Neutral.C.Pessimistic.D.Optimistic.高二英语试题卷第5页共8页
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