How any fetus survives gestation has baffled scientists for decades: the embryo’s tissues are half foreign and yet, unlike______

admin2011-01-17  38

问题 How any fetus survives gestation has baffled scientists for decades: the embryo’s tissues are half foreign and yet, unlike______organ transplant, it isn’t normally rejected.

选项 A、an adaptive
B、a mismatched
C、a successful
D、an obdurate
E、a preplanned

答案B

解析
转载请注明原文地址:https://kaotiyun.com/show/OPjO777K
本试题收录于: GRE VERBAL题库GRE分类
0

随机试题
最新回复(0)