请教OG第176题

excellent

176. As a result of the ground-breaking work of
Barbara McClintock, many scientists now believe that all of the information encoded in 50.000 to 100.000 of the different genes found in a human cell are contained in merely three percent of the cell's DNA.
(A)50,000 to 100,000 of the different genes found in a human cell are contained in merely
(B)50,000 to 100,000 of the human cell's different genes are contained in a mere
(C)the 50,000 to 100,000 different genes found in human cells are contained in merely
(D)50,000 to 100,000 of human cells' different genes is contained in merely
(E)the 50,000 to 100,000 different genes found in a human cell is contained in a mere

答案为E。请问这里a human cell能不能用human cells替换？in a mere能不能被in merely替换？这些OG当中没有解释，请牛牛们指点！谢谢！

dreadpower

不能用human cells替换，因为每个human cell都有50,000 to 100,000 different genes

     mere是形容词，修饰three percent of the cell's DNA（名词），merely是副词，修饰形容词

excellent

这个解释证实了我的看法，但为什么OG没有这些注释呢？或许it认为这不值得一提啊！