人体胆固醇的生理功能之一是（ ）
A：促进肠道对钙和磷的吸收
B：调节内环境的渗透压
C：作为细胞内良好的储能物质
D：参与细胞膜的构成
—It's Mid-autumn Day today. Don't forget to give my best wishes to your family.
—__________. Thank you very much.
下列生物中不属于昆虫的是（ ）
