关于动物内环境稳态的叙述，错误的是（    ）
①血浆渗透压与蛋白质含量有关，与无机离子含量无关
②H₂CO₃/NaHCO₃是维持细胞外液pH稳定的缓冲物质
③细胞内、外的Na^＋、K^＋分布不平衡状态是通过消耗能量来维持的
④运动后Na^＋、K^＋排出体外较多，但机体的内环境仍维持相对稳定状态
⑤抗原与抗体的特异性结合发生在内环境中 ⑥内环境成分中含有CO₂、尿素、神经递质等
⑦组织液渗回血浆和渗入淋巴的量相差较大   ⑧血浆的成分稳定时，机体达到稳态

完形填空。

     Jean is an English girl. She lives in Beijing 1 her parents. She doesn't know Chinese very 2. But she 3 very hard. She often speaks 4 in class and after class. Sometimes her classmates don't understand her 5 she can't speak Chinese well.

    It's Sunday morning. Jean wants to 6 some flowers, but she doesn't know the 7 to the flower shop. She asks a Chinese boy for help. The boy can't 8 her. Then she takes out a pen and a piece of paper and draws a 9 of a shop and some flowers. The boy looks at it and then 10 her the way.