鼓岬为下列何种结构的所在处()。
A.镫骨底板
B.前庭窗
C.圆窗
D.蜗窗
E.耳蜗底周
参考答案:E
解析:鼓岬是鼓室内壁中央较大的膨凸,系耳蜗底周所在处,其表面有鼓室神经丛。
They sold ______ boxes of such sweets last week.
A.four dozens of
B.four dozen
C.four dozen of
D.four dozens
Nylon line is better suited than manila for().
A.Towing alongside
B.Towing astern
C.Holding knots and splices
D.Resisting damage from chemicals