要用一根绳子和两个滑轮提起物体，若不计滑轮重及摩擦，而使拉力为物体重的1/3，请在图中画出绳子的正确绕法。
During the Middle Ages, a conventional artist was not interested in showing nature and people _____they really were.
A. who B what C. like D. as
肝脏胶体显像（）。
A.特异性摄取
B.循环通道
C.细胞吞噬和胞饮作用
D.选择性浓聚
E.排泄和清除
