不符合先天性色盲特点的有
A．女多于男B．多见性连锁隐性遗传病C．患者出生时即有D．有遗传倾向E．一般双眼对称
参考答案：A
牙挫伤时，主要影响到牙的何部分（）
A.牙釉质
B.牙本质
C.牙骨质
D.牙髓
E.牙周膜
— Mom, what did your doctor say?
— He advised me to live ______the air is fresher. [ ]
A. where
B. in which
C. in where
D. the place where
