前庭器官中各类毛细胞的适宜刺激是
A.对细胞任何部位的机械扩张
B.加于纤毛根部的特殊化学物质
C.传到细胞膜上的膜电位改变
D.与纤毛生长面平行的机械力
参考答案:D
—Come on,please give me some ideas about the project.
—Sorry. With so much work my mind,I almost break down.
A.filled
B.filling
C.to fill
D.being filled
—When is your first class?
—It’s at 8:20 am.
A.What’s the time
B.What time
C.Where
D.Why