【单选题】If a person doesn't have had enough sleep, his actions will give him _____ during the day. [ ]
【单选题】If a person has not had enough sleep,his actions will give him ___ during the day.
【单选题】计算机病毒按其感染方式可分为 、文件型、混合型、宏病毒和网络病毒五类。
【单选题】在股票股价的模型中,假设未来股利不变,其支付过程呈永续年金形式的是
【单选题】关于计算机病毒下列叙述错误的是
A.
计算机病毒的主要特点有:寄生性、破坏性、传染性、潜伏性和隐蔽性
B.
计算机病毒按其感染的方式可分为:引导性病毒、文件型病毒、混合型病毒、宏病毒和Internet病毒
C.
计算机病毒的清除方法是手工清除和借助反病毒软件清除病毒
D.
传播计算机的两大途径是网络和通过键盘输入数据时传入
【判断题】亚历山大.萨克斯是美国总统里根的私人顾问。()
【单选题】四年级在体育节中购买 的 风筝每个 x 元, 一 把 花伞比 一个 风筝贵 3 元, 一 把花伞( )元。
【单选题】计算机病毒按其感染方式,可分为( )。
C.
宏病毒、 Internet 病毒(网络病毒)
【简答题】What do people do on Home Movie Day? [A]They watch old movies at home. [B] They give away old movies for free. [C] They share home movies with others. [D] They show movies at the U of C library.