Corti器位于（）
A.前庭膜
B.基底膜
C.螺旋韧带
D.嵴帽
E.壶腹嵴
参考答案：B
It was really _____ of your brother not to play the guitar while you were preparing your lessons.
A．modest
B．outspoken
C．considerate
D．determined
奥利司他可引起维生素血浆浓度下降，最明显的是（）
A.维生素A
B.维生素B
C.维生素C
D.维生素D
E.维生素E
