单选题 The gene therapy differs from HAART in that______.

A、 HAART is presently employed as a drug-based treatment
B、 the gene therapy plays a minor role in relation to HAART
C、 the gene therapy can stop HIV infection from becoming full-blown AIDS
D、 HAART may produce questionable results, while gene therapy will certainly not

【正确答案】 A

【答案解析】文章第六段“最近的研究表明，HAART是一种昂贵的药物疗法”。因此[A]“目前，HAART是以药物为基础的疗法”是HAART与基因疗法的区别所在。[B]基因疗法与HAART有一点联系[C]基因疗法能够阻止艾滋病病毒引起全面的艾滋病病发；[D]HAART可能会产生令人怀疑的结果，而基因疗法肯定不会。