Birthday attacks are

A.Excuse me, my friend sent me a flower

B.Fine, I never go to birthday parties

C.Ha…ha, I don’t like birthday parties

D.Sorry, but my wife had a car accident

I have just got an iPod as my birthday gift.()

A、 Good luck

B、 That’s right

C、 Congratulations

●Most computer systems are (71) to two different groups of attacks:Insider attacks and outsider attacks． A system that is known to be (72) to an outsider attack by preventing (73) from outside can still be vulnerable to the insider attacks accomplished by abusive usage of (74) users． Detecting such abusive usage as well as attacks by outsides not only provides information on damage assessment, but also helps to prevent future attacks． These attacks are usually (75) by tools referred to as Intrusion Detection Systems．

(71) A．vulnerable

B．week

C．sensitively

D．helpless

(72) A．reliable

B．secure

C．indestructible

D．steady

(73) A．visit

B．access

C．I/O

D．read/write

(74) A．power

B．rights

C．authorized

D．common

(75) A．searched

B．checked

C．tested

D．detected

Most computer systems are (71) to two different groups of attacks：insider attacks and outsider attacks．A system that is known to be (72) to an outsider attack by preventing(73) from outside can still be vulnerable to the insider attacks accomplished by abusive usage of (74) users．Detecting such abusive usage as well as attacks by outsides not only provides information on damage assessment,but also helps to prevent future attacks．These attacks are usually (75) by tools referred to as Intrusion Detection Systems．

(77)

A．vulnerable

B．week

C．helpless

D．sensitively

Write an invitation letter based on the following situation:

Your birthday is on Saturday next week. Please write an informal invitation letter to invite your American friend Peter to come to your home for your birthday party.

A

I'm Joe． I-m twelve years old． I like September very much． September 9th is my birthday， and my father's birthday is in September，too．We have a birthday party ev-ery year． Teachers Day is in September， too． And I can play with all my teachers． So September is my favorite． What about you?

( )21．1t is Joe's________ birthday this year．

A． twelve

B．twelfth

C． ninth

D． nine

设有关系模式SC(Sno, Sname, Sex, Birthday, Cno, Cname, Grade, Tno, Tname)满足函数 依赖集：{Sno→Sname, Sno→Sex, Sno→Birthday, Cno→Cname,(Sno, Cno)→Grade, Tno→Tname}.SC的主码和属性集(Sno, Tno)的闭包分别是

A．(Sno,Tno)和{Cno,Cname,Grade,Tno,Tname}

B．(Sno, Cno,Tno) 和{Sno, Sname, Sex, Birthday, Cno}

C．(Sno, Cno)和{Sno, Sname, Sex, Birthday, Cno, Cname, Grade}

D．(Sno, Cno,Tno)和{Sno, Sname, Sex, Birthday, Tno, Tname}

Most computer systems are(165)to two different groups of attacks: Insider attacks and outsider attacks. A system that is known to be(166)to an outsider attack by preventing(167)from outside can still be vulnerable to the insider attacks accomplished by abusive usage of(168)users. Detecting such abusive usage as well as attacks by outsides not only provides information on damage assessment, but also helps to prevent future attacks. These attacks are usually(169)by tools referred to as Intrusion Detection Systems.

A．vulnerable

B．week

C．sensitively

D．helpless

My father's birthday is on May the ______ (two)．