题目

完形填空My childhood andadolescence were a joyous outpouring of energy, an endless pursuit forexpression, skill, and experience. 1 was only a background to the great delight oflessons in music, dance, and dramatics. Then one night at ahigh school dance, a remark, not intended for my 2,injured my youthful happiness: That girl, what a pity she is blind.Blind! A(n) 3 word that implied everything dark, blank andhelpless. 4 Iturned and called out, Please don't feel sorry for me, I'm having lots offun.5 the fun was not to last.In college years, Ibegan to struggle with the problem of earning a li 下列关于基因工程应用的叙述，正确的是 [　　] A．基因治疗就是把缺陷基因诱变成正常基因 B．基因诊断的基本原理是DNA分子杂交 C．一种基因探针能检测水体中的各种病毒 D．原核生物基因不能用来进行真核生物的遗传改良