（1）What did the United States Army want medical experts to do？
A.To know more about mosquitoes.
B.To stop yellow fever from spreading.
C.To find out what disease the soldiers had got.
（2）How many researchers developed yellow fever before Doctor Lazear？
A.2.
B.7.
C.9.
（3）What did Doctor Lazear prove？
A.Mosquitoes could spread yellow fever.
B.The soldiers didn't die of yellow fever infections.
C.Young men were more likely to develop yellow fever.
（4）What did the researchers do after Doctor Lazear's death？
A.They immediately went back to America.
B.They turned their attention to other insects.
C.They chose to put their lives at risk for the research.
【考點】聽長對話．
【答案】見試題解答內容
【解答】
【點評】
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發(fā)布：2024/7/25 8:0:9組卷：0引用：1難度：0.5
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