某种电脑病毒传播非常快,如果一台电脑被感染,经过两轮感染后就会有81台电脑被感染

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问题:

某种电脑病毒传播非常快,如果一台电脑被感染,经过两轮感染后就会有81台电脑被感染.请你用学过的知识分析,每轮感染中平均一台电脑会感染几台电脑?若病毒得不到有效控制,3轮感染后,被感染的电脑会不会超过700台?

考点:一元二次方程的应用
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Mrs. Green is a nurse. She lives in England. Her husband(丈夫) Mr. Green is a Japanese  56  at a high school. They have   57  kids: one is a son   58  his name is John. They also have two   59 : Lucy and Lily. This year they have another(另一个) baby. Mr. and Mrs. Green love her very much. But they have their work, so a woman looks   60  the young baby. She is new here. 

A neighbour(邻居)  61  the baby. She likes her very much.

“Look at the baby,” she says. “She looks very cute! I think she   62  Mr. Green. They

  63  have big eyes. But what’s her name?”

  64 ,” the woman says. “She is only five months(月) old. You know, she can’t   65 . ”

小题1:A. student                       B. teacher               C. doctor

小题2:A. two                   B. three                 C. four

小题3:A. and                     B. but                  C. so

小题4:A. sons                          B. daughters            C. brothers

小题5:A. at                            B. for                C. after 

小题6:A. finds                    B. studies                C. sees

小题7:A. looks like                       B. thinks about           C. comes from

小题8:A. all                        B. both               C. some

小题9:A. I don’t know      B. That’s all right          C. I think you are right

小题10:A. tell                         B. speak               C. say 

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商业银行不得销售无产品(计划)期限的理财产品(计划)。( )

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简述票据行为中付款的含义及付款人的责任。

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日本经济发达的主要原因之一是[ ]

A、本国自然条件十分优越,资源丰富

B、人口众多,国内市场大

C、农业发达,为工业发展提供了丰富的原材料

D、进口原料,出口产品,积极开拓国际市场

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创伤性休克的现场急救措施中,不包括()

A.制动,去枕平卧或低斜坡卧位,抬高下肢15°~20°

B.保持呼吸道通畅,给氧,呼吸骤停,及时气管插管或切开,人工辅助呼吸

C.及时止血、包扎、固定

D.纠正贫血、电解质和酸碱平衡紊乱

E.立即建立静脉输液通道补充血容量

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