“蚕豆病”是由于下列哪一项影响红细胞膜稳定的因素所致
A.红细胞膜蛋白的遗传性缺陷
B.红细胞酶缺陷
C.免疫因素
D.能量代谢紊乱
E.生物因素
参考答案:B
(2013·泰安一模)________ in the countryside made Mr. Wilson very hardworking when he was very young.
A.Bringing up
B.Having brought up
C.Being brought up
D.Brought up
发情控制的关键是什么?