A:取a点溶液,滴加盐酸,产生白色沉淀
B:图标上b〜c段质量增加的原因是Zn与Cu(NO3)2溶液反应
C:b点时溶液中金属离子有Zn2+、Cu2+,金属单质有Zn、Cu、Ag
D:c点和d点溶质种类相同,金属单质种类不同
《新全球史》言及古代中国某制度时说:“其目的在于确保土地的平均分配,以避免出现类似于汉朝的土地兼并。这项制度根据土地的贫瘠和受地者的需要将土地分配给个人及其家庭。”下列有关这一制度的评述正确的是
先阅读短文,然后用下面方框中所给的单词或短语填空,使全文在逻辑上正确。(提示:选项中有一个是多余的。)
I’d like to tell you a story about my best friend Jane. Last week in school we had a big fight, and she didn’t____ me. It all started when she asked me if she could copy my homework. I asked her why she wanted to do that, and she said that she had forgotten to do hers. I said I didn’t think it was a good idea. I said it would start a bad____ and she should do her own work. She got really____ at me and said she didn’t want to be my best friend anymore. I said that was OK and that I was sure she would ____ it. And she did. Yesterday she told me she was ____. She said it was much better if she did her own work.
①核膜的有无 ②核糖体的有无 ③细胞壁的有无 ④膜上磷脂的有无.