下列关于动物细胞培养的有关叙述中正确的是 （ ）

由以下粒子结构示意图得出的结论中错误的是（   ）

阅读材料：

材料一：2017年3月15日，十二届全国人大五次会议表决通过了《中华人民共和国民法总则》。总则规定：胎儿有遗产继承和接受赠与权利、限制民事行为能力年龄由10岁降为8周岁等。

材料二：2017年5月31日，八起原省部级官员受贿案一审宣判，其中，宁波市原市长卢某、国家统计局原局长王某、洛阳市委原书记陈某受贿均超过1亿元，加上广东省原副省长刘某，共有4人被判处无期徒刑。

结合所学知识，对上述两则材料进行评析。

— _____ do you go to the nursing home?

— Twice a week. We clean their rooms and do some shopping for them.

阅读理解A
    I'm Linda．I can't find my keys．I lost them this morning．There is a Lost and Found box in our classroom．My keys may (可能)be in the box．
    Oh, there are many things in the box．This is a pencil box．What color is it? It's yellow．That is a white eraser．And what's that? It is a watch．A picture of a CD is on it．It's Sara's．Wow! I find my keys．One is to my classroom，and the other (另一个)is to my house．That green cup is Jack's．This baseball is his，too．I will(将)ask him to take his things．Three rulers, two pencils and two nice pens are also in the box．Whose are they? I don't know．
根据材料内容判断正误。