下列哪一动脉不参与形成脑底动脉环( )
A．大脑前动脉B．大脑中动脉C．大脑后动脉D．颈内动脉E．以上都不对
参考答案：B
—Does he ______ an English name?
—Yes, he does. [ ]
A. is
B. have
C. has
教学系统设计的应用范围
