题目

There are few places on earth where nature can be seen in almost primitive (原始的) condition. One is the Galapagos Islands, where largely strange and unusual birds, animals and plants live and grow—many of which are found nowhere else in the world. These islands lie directly on the Equator, about 1,000 kilometers west of the South American mainland. But the Galapagos is now facing a crisis（危机）. Its human inhabitants（居民）, who live on the island of Santa Cruz, want to develop the business and tourist of the islands. Recently, they have been having a serious argument 把一个细胞中的磷脂分子全部提取出来，在空气和水界面上将它们铺成单分子层（假定单分子间距离适当且相等），推测在下列生物中空气和水界面上磷脂分子层的表面积与原细胞的表面积之比最小的细胞是（ ）A.洋葱鳞片叶外表皮细胞B.乳酸菌细胞C.蛙成熟的红细胞D.酵母菌细胞