辨别声源方向，协同集声作用的是
A．外耳生理B．中耳生理C．耳蜗生理D．中枢听觉通路生理E．前庭生理
参考答案：A
The two countries agreed to ________ their differences and work together for peace, which has a positive effect on the international situation.
A．set down
B．set out
C．set aside
D．set about
下列数据3，2，3，4，5，2，2的中位数是【 】
A．5
B．4
C．3
D．2
