位于前庭襞下方的喉腔部位是
A．喉口B．喉前庭C．前庭裂D．声门裂E．喉室
参考答案：E
Doctor, the medicine doesn't ______. Can you give me another? [ ]
A. use
B. need
C. make
D. work
简述PRACH功率攀升步长（Power Ramp Step）（WCDMA）。
