A:血浆pH的稳定主要通过HC03﹣,HPO42﹣等离子来推持
B:组织液中的小分子物质可来源于血浆
C:内环境的O2浓度大于细胞内液
D:血浆成分稳定时,机体一定会达到稳态
Liu Maodan
Twelve years old
China
Dear Xiaohong,
You are a lovely girl. We are in the same class in the primary school. We always have a great time at school. You are my good friend. You always help me in English. Thank you very much! I will remember you forever. Good luck for the future!
Yours,
Liu Miaodan
— _______. I also want to know about the weather for tomorrow.
如果角θ的终边经过点 (−32,12) ,那么tanθ的值是( )
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