双锥回转真空干燥机真空度是多少？
参考答案：双锥回转真空干燥机真空度是0.06Mpa-0.08mpa。
单项选择。
— ______?
— It's here. [ ]
A．What's your name?
B．Where is the radio?
C．How are you?
D．How old are you?
行使管制权的主体是县级以上人民政府的公安机关。( )
