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问题详情

The author cites the example of eye surgeons to illustrate that

A、pinpoint beams have an extensive energy source

B、pinpoint beams with different sources have different effects

C、pinpoint beams have effects on living cells

D、pinpoint beams enable surgeons to do the most different operation

时间：2021-12-31 18:43 关键词：英语四级外语考试

答案解析

B
【解析】 B。细节题。第三段第一句提到，实验证明，来源不同的激光只会对某些特定的活细胞产生作用，即激光来源不同，作用也不同。文章接着就举出了眼科医生治疗眼睛的例子。故答案为B。

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