Citrix XenServer用什么工具管理（）
A.Hyper-V
B.vSphere
C.XenCenter
D.Vcenter
参考答案：C
Those successful deaf dancers think that dancing is an activity ___ ___ sight matters more than hearing.
A．when
B．whose
C．which
D．where
肝阳上亢头痛的特点是
A．空痛
B．隐痛
C．窜痛
D．灼痛
E．胀痛
