一百多年前，人们就开始了对遗传物质的探索历程。下列有关叙述不正确的是（ ）
A：最初认为遗传物质是蛋白质，是因为氨基酸的多种排列顺序可能蕴含遗传信息
B：在艾弗里肺炎双球菌转化实验中，细菌转化的实质是发生了基因重组
C：噬菌体侵染细菌实验之所以更有说服力，是因为其蛋白质与DNA完全分开
D：噬菌体侵染细菌实验中，只有在离心后的沉淀物中才能测到放射性同位素32P
11﹣13世纪，西欧城市兴起，西欧的城市如法兰克福、伦敦、威尼斯、热那亚、巴黎、佛罗伦萨等都是这一时期兴起的。西欧城市兴起最伟大的意义是（ ）
Here is a picture. It is a picture of my 1 This is my 2. My quilt is on it. Two baseballs are under it. They are white 3. Look at my desk. A4is on it. I like computer games. A 5is on it, too. It's 9:00. My 6is in my schoolbag and two7are in it. My books are8the floor. My keys are in the desk.9is my ID card? Do you10? Oh, it's in my English book. I like my room. It's nice.
