皮皮学，免费搜题
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【简答题】
计算机病毒是一个程序，一段可执行的代码，就像生物病毒一样，具有自我繁殖、互相传染以及激活再生等特性。
拍照语音搜题，微信中搜索"皮皮学"使用
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皮皮学刷刷变学霸
举一反三
【简答题】自我意识是个体对自己以及自己与周围事物关系的意识。（ ）
【单选题】B Perhaps you have known a lot about the Internet．But what is it，do you know? The Inter-net is a network． It uses the telephone to join millions of computers together around the world． Maybe that does...
A.
Internet
B.
Information
C.
Computer
D.
E-mail
【简答题】创建“店铺优惠券”或“满立减”活动。
【单选题】— Did you wait for him very long? — Yes, I ______ to bed until five in the morning.
A.
did go
B.
didn't go
C.
had gone
D.
went