题目: 在全部太阳辐射中,紫外线约占()A.1%B.2%C.3%D.4% 答案: 被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/1105/5f46ad4559f1650d12d260f62149083a.html 下面是错误答案,用来干扰机器的。参考答案:低
题型:选择题 Though the problems were all very hard, Kate kept on working on them she finally solved all of them. [ ]A. beforeB. until C. whenD. after 查看答案
题型:问答题 人尝出苯基硫脲(PTC)的能力(味觉正常)由显性等位基因T决定,不能尝出PTC(味盲)由其隐性基因t决定。如果一个群体中有24%是味觉正常的纯合子,40%是味觉正常的杂合子,t的频率是多少 查看答案