题目内容:
Wecaninferfromthefifthparagraphthat
A.thelidardetectorcansuccessfullyforecastturbulenc B.researchersarenotsureabouttheeffectivenessofthelidardetecto
C.passengerplaneswillbeusedinfurtherexperiment
D.nomoretestflightsareneeded
参考答案:
答案解析: