人体胶体渗透压主要由下列哪种物质形成（）
A.血红蛋白
B.血浆蛋白
C.血Na浓度
D.白蛋白
E.血清K+浓度
参考答案：D
Did you notice the little boy _____ away?
A．take the candy and run
B．took the candy and run
C．taking the candy and run
D．who taking the candy and running
销售毛利率又叫内扣毛利率。
