题型:填空题 Apart from knowledge, a good personality is every child should try to obtain during his or her growth.A.whenB.thatC.whereD.what 查看答案
题型:填空题 关于遗传物质的叙述,正确的是()①肺炎双球菌的转化实验,证明DNA是主要的遗传物质②大肠杆菌的遗传物质是RNA③DNA是主要的遗传物质④病毒的遗传物质是DNA和RNA⑤水稻的遗传物质是DNA A.①②④B.③⑤C.③④⑤D.①③⑤ 查看答案