耳蜗性耳硬化病灶可累及（）。
A.前庭窗
B.镫骨环韧带
C.蜗窗
D.镫骨足板
E.镫骨足弓
参考答案：C
We'll plant trees tomorrow, and I don't know _____ Tom will come and join us. [ ]
A. if
B. which
C. what
D. where
下列何处不产生ALP
A．骨B．肠C．心脏D．肝E．胎盘
