关于胎盘产生的激素的描述,下列哪项是错误的?
A. 人绒毛膜促性腺激素(HCG)与人绒毛膜生长素(HCS)都是糖蛋白激素
B. HCG 的生理功能与 LH 相似
C. HCS 有促生长作用,促进胎儿摄取营养
D. 雌三醇的主要前身物质来自母体的胆固醇
E. 孕激素的生理作用是维持子宫内膜,抑制 T 细胞,防止母体排斥胎儿
无排卵月经通常是由于缺少
A. 雌激素
B. 孕激素
C. 雌激素和孕激素
D. FSH
E. LH
— John went to the hospital alone.— If he ________ me about it, I would have gone with him.
A. should tell
B. tells
C. told
D. had told
If we ________ the other road, we might have arrived here in time for the meeting.
A. take
B. had taken
C. took
D. have taken