[audioFiles]audio_eufm_047(20106)[/audioFiles]A、Increase the sample number.B、E

游客2023-07-26 79

问题

选项 A、Increase the sample number.
B、Extend the time of the study.
C、Observe the sample group of vegetarians.
D、Both A and B.

答案 D

解析短文中提到为了进一步检验他们的发现，they increased the sample number…The study was extended for a further six months，由此可知选项D为正确答案。

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