单选题 The DNA designed by Evan's technology differs strikingly from that synthesized by existing technology in that the former is characterized by its

A、 desirable shape and length.
B、 imitation of a living cell.
C、 delicate but destructive power.
D、 resistance to epidemics.

【正确答案】 A

【答案解析】题干问：“由Evan技术设计的DNA与由现成技术合成的DNA不同在于前者的特征是……。”根据原文信息，由Evan技术设计的DNA“有让人满意的大小和长度”，选项[A]表达了此意。而选项[D]“模仿一个活着的细胞”，[C]“有一种微妙的具有破坏性的力量”以及[D]“能抵抗流行病”皆不符合题意。