There has been a change in doctors’ understanding

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There has been a change in doctors’ understanding of the cause of stomach ulcer.

A. Right

B. Wrong

C. Not mentioned

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  • 答案:A

    题意:对造成胃溃疡的原因,医生们的看法有了变化。根据文章第二段第八、九句Doctors believed that ulcers were caused by…Now they have discovered that…可知,医生们过去认为胃溃疡是由浓胃液损失胃组织引起的,而现在他们发现大部分胃溃疡是由 细菌造成的。所以题干叙述正确。故本题选A。