血友病A为（）
A.常染色体隐性遗传
B.多基因遗传病
C.X连锁隐性遗传
D.X连锁显性遗传
E.染色体畸变遗传病
参考答案：C
---Linda didn’t invite us to the party.
— ______? I don’t care.
A．For what
B．So what
C．What’s on
D．What’s up
______ their service, the workers of the hotel are active in learning English.
A．Improving
B．To improve
C．Improve
D．Having improved
