高位油箱一般安装在高于压缩机组转轴中心线（）m以内的距离。
A.1～2
B.3～4
C.4～5
D.6～8
参考答案：D
The mayor has offered a reward of $5000 to _____ who can capture the tiger alive or dead. [ ]
A. both
B. others
C. anyone
D. another
音强与下列哪个因素直接相关()
A．声带长度
B．声门下压
C．声门下容积
D．声带紧张度
E．声带厚度
