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[ GMAT ]
討論串[CR. ] GWD-12-Q38
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題幹已經說 It is too. expensive for farmers to use routinely, and since it is not effective until amonth after vaccination, administering it after an outbr
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Outbreaks of Rift Valley fever occur irregularly in East Africa, several. years apart. When outbreaks do occur, they kill thousands of cattle. A. live
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