Before testing this method on patients, Dr. Baker had tests for two yearson three hundred dogs.A.fou

题目简介

Before testing this method on patients, Dr. Baker had tests for two yearson three hundred dogs.A.fou

题目详情


Before testing this method on patients, Dr. Baker had         tests for two years
on three hundred dogs.
A.found outB.helped outC.worked outD.carried out
题型:单选题难度:偏易来源:不详

答案

D

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