下列哪种物质通过受体介导的胞吞作用进入细胞()
A.低密度脂蛋白
B.维生素B12
C.流感病毒
D.铁离子
E.钠离子
参考答案:A, B, C, D
Miss Taylor never wastes money on anything too expensive, even though (尽管)
she can _______ to. She has donated much of the money she saved to charities.
A.afford
B.spend
C.pay
D.cause
完全统一化的同产业间共同配送适用于百货店企业和生产企业。