可聚类全球单播IPv6地址结构分为3级，其中第1级表示的含义是(55)。 A．全球共知的子网前缀 B．网络接口 C．全球共知的公共拓扑 D．本地网络
A、第7～8位表示寄达国家代码
B、第9～11位表示寄达互换局代号
C、第12位表示总包号码
D、第13位表示总包种类代码
判断图中是否有负权回路 Bellman-ford 算法
x[I],y[I],t[I]分别表示第I条边的起点，终点和权。共n个结点和m条边。
procedure bellman-ford
begin
for I:=0 to n-1 do d[I]:=+infinitive;
d[0]:=0;
for I:=1 to n-1 do
for j:=1 to m do {枚举每一条边}
if d[x[j]]+t[j]<d[y[j]] then d[y[j]]:=d[x[j]]+t[j];
for I:=1 to m do
if d[x[j]]+t[j]<d[y[j]] then return false else return true;
end;
件号标志CaseNO.3/18-5表示（）
必背的关联词60 个 表示而且whats morebesidesin additionFurthermoremeanwhilenot only- but also-as well asto begin with / First of all/ First / Second/Third第1页，共18页。表示对照howeveron the other handon the contrary表示因果as a resultthereforethusotherwise第2页，共18页。表示目的for this reasonfor this purposeso thatin order toin case表示总结in a wordin shortin briefin conclusionin other wordsgenerally speaking第3页，共18页。表示强调in factas a matter of factto tell the truthlast but not leastabove allthe most importantwithout any doubtbelieve it or notOnly in this way第4页，共18页。表示个人观点in my opinionas far as I knowas far as I am concernedAs we all know,表示解释that isin this casefor exampleactuallyas for表示条件as long as第5页，共18页。at firstearly in the morningthis morningthe other daysoonlater onafter a whileseveral minutes later,finallyin the endat lastsuddenlyimmediatelyat once表示时间第6页，共18页。表示方位by the side of next toin the middle ofin front of第7页，共18页。1 我认为，志愿者工作不仅对社会有利，而且对他们自己有好处，因此志愿者是光荣的，我们都应积极参加，使我们的国家变得更和谐更美丽。2 为了援助贫困边远地区的教育，一些志愿者加入到西部建设中.同时，还有些志愿者组织各种活动宣传环境保护的重要性。用恰当的关联词翻译第8页，共18页。In my opinion, doing voluntary work will do much good not only to society but also to the volunteers themselves. Therefore, volunteers are honorable and we should take an active part in it to make our country more beautifuland harmonious.第9页，共18页。In order to improve the standard of education in those remote and less developed areas, somevolunteers join in the Go West Project. Whatsmore, some others organize various activities to help people realize the importance of protecting our environment.第10页，共18页。3. 大约75%的学生上大学有必要，因为高等教育能增加知识，提高个人素质。然而，15%的学生认为上大学没有用，因为大学毕业生找到好工作很困难。而且，学费也太高，付不起。剩余的10%认为条条道路通罗马，所以他们认为是否上大学无所谓。第11页，共18页。About 75% of the students think it necessary to go to college, for further education can increase their knowledge and improve their personal qualities as well. However, 15% of the students think that it is no use going to college because its extremely difficult for college graduates to get satisfactory jobs. In addition, the tuition is too high for them to pay for. The remaining 10% hold the view that “ All roads lead to Rome”. Therefore they think it doesnt make any difference whether they go to college or not.第12页，共18页。According to my investigation, some 10 percent of the migrant children are out of school and about 75% of them can only attend cheap private schools where they are offered a poor quality of educatio
资源/储量编码采用（EFG）三维编码，E、F、G分别代表经济轴、可行性轴、地质轴。第1位数表示（），第2位数表示（），第3位数表示（）。
件号标志SET·Case（2）－3/8表示（）
申请表银行专用栏JGH共10位数字组成，第1位标识（）。
IPv6地址分为3级，其中第1级表示的含义是（）。
件号标志BagsNO.81/120表示（）