The(72)in e-mail messages has affected almost every computer around the world and has caused the damage of up to US$1 billion in North America．

A．illness

B．virus

C．weakness

D．attachment

[单选题] The （72） in e-mail messages has affected almost every computer around the world and has caused the damage of up to US$1 billion in North America.（72）A． illnessB． virusC． weaknessD． attachment

[单选题]The ______ in e-mail messages has affected almost every computer around the world and has caused the damage of up to US$1 billion in North America.A．illnessB．virusC．weaknessD．AttachmentA．B．C．D．

[单选题]The [deadly]disease has affected these animals.A.contagiousB.seriousC.fatal

[单选题]The [deadly]disease has affected these animals.A.contagiousB.seriousC.fatal

[单选题] The （72） has several major components, including the system kernel, a memory management system, the file system manager, device drivers, and the system libraries.（72）A． applicationB． information systemC． operating systemD． iterative

[单选题]E．-mail指的是（ ）。A．利用计算机网络及时地向特定对象传送文字、声音、图像或图形的一种通信方式B．电报、电话、电传等通信方式C．无线和有线的总称D．报文的传送

[单选题]e-mail指的是（ ）。A．利用计算机网络及时地向特定对象传送文字、声音、图像或图形的一种通信方式B．电报、电话、电传等通信方式C．无线和有线的总称D．报文的传送

[名词解释] E-mail

[单选题]The(72)has several major components, including the system kernel, a memory management system, the file system manager, device drivers, and the system libraries.A．applicationB．information systemC．operating systemD．iterative

[填空题] 在添加E-mail连接时，在E-mail地址前加上（）。