有关先天性肾上腺皮质增生症的实验室检查，下列不正确的是（）

A.皮质醇和ACTH浓度常在正常范围内

B.11β-羟化酶缺乏症患儿，尿液17-羟类固醇水平有增高

C.21-羟化酶缺乏症患儿，尿液17-酮类固醇水平有增高

D.17α-羟化酶缺乏症患儿，血浆和尿中脱氧皮质酮明显增高

E.失盐型21-羟化酶缺乏症患儿，血脱氧皮质酮明显增高

If you had joined the chat room ten minutes ago, you ______what we were talking about!

A．have known

B．knew

C．would have known

D．would know