卵子的（   ）对精子选择最为严格，一般只允许一个精子进入。
A、放射冠
B、透明带
C、卵黄膜
D、卵黄周隙

A.Hyperv1hasavirtualswitchnamedSwitch1.YoureplaceallofthenetworkadaptersonHyperv1withnewnetworkadaptersthatsupportsinglerootI/Ovirtualization（SR-IOV）.YouneedtoenableSR-IOVforallofthevirtualmachinesonHyperv1.Whichtwoactionsshouldyouperform？（）
A.Oneachvirtualmachine，modifytheAdvancedFeaturessettingsofthenetworkadapter
B.ModifythesettingsoftheSwitch1virtualswitch
C.Delete，andthenrecreatetheSwitch1virtualswitch
D.Oneachvirtualmachine，modifytheBIOSsettings
E.Oneachvirtualmachine，modifytheHardwareAccelerationsettingsofthenetworkadapter