题目

下列关于细胞衰老和凋亡的叙述，错误的是（ ） A . 细胞衰老过程中，相对表面积增大 B . 细胞衰老过程中，呼吸速率会下降 C . 机体清除被新冠病毒感染的细胞不属于细胞凋亡 D . 细胞凋亡对于生物体维持内部环境的稳定至关重要 答案：C补全对话。根据对话内容，从下边方框中选出适当的选项补全对话，并将选项的编号依次填人题前括号内。(共4小题，每小题1分；计4分) A：Excuse me.____________．  B：Yes，and you are…? A：_____小题1:__. This is my membership card．Would you please show me your passport? B：OK．__小题2:____.  A：Welcome to Beijing，Miss White．I am so glad that you are the first guest I have received． B：Thank you，Miss Chen. ___小题3:____. A： Let me help you with your suitcase．Our car is waiting for us just at the entrance. It will take us to the hotel． B：Thank you very much for your good service．    A：It’s a pleasure．