The city's road system is () handling the current volume of traffic. A.incapable ofB.routeC.distributeD.able of
The city's road system is () handling the current volume of traffic.
A.incapable of
B.route
C.distribute
D.able of
相关考题:
建立一个供应商、零件数据库。其中"供应商"表S(Sno,Sname,Zip,City)中的属性分别表示供应商代码、供应商名、供应商邮编、供应商所在城市,其函数依赖为Sno→(Sname,Zip,City),Zip→City。"零件"表P(Pno,Pname,Color,Weight,City),表示零件号、零件名、颜色、重量及产地。表S与表P之间的关系SP(Sno,Pno,Price,Qty)表示供应商代码、零件号、价格、数量。"供应商"表S属于()A.1NFB.2NFC.3NFD.BCNF
● 建立一个供应商、零件数据库。其中“供应商”表 S(Sno,Sname,Zip,City)分别表示:供应商代码、供应商名、供应商邮编、供应商所在城市,其函数依赖为:Sno→(Sname,Zip,City ) ,Zip→City。 “供应商”表 S属于 (53) 。(53)A. 1NFB. 2NFC. 3NFD. BCNF
阅读以下说明和java代码,将应填入(n)处的字句写在对应栏内。[说明]本程序使用类来管理员工的通讯地址信息。已知程序的输出为:输出记录:5姓名:王丽华街道地址:中华路15号市:襄樊市省:湖北省邮政编码:430070[Java代码]public class Employee{protected String (1);protected String street;protected String city;protected String prov;protected String post;protected int no;public Empbyee(){}public Employee(String name,String street,String city,String prov,String post, (2) ){this.name=name;this.street=street;this.city=city;this.prov=prov;this.post=post;this.no=no;}public static void main(String[]args){Employee emp=new Employee(“王华”,“中华路15号”,“武汉市”,“湖北省”,“430070”,1);emp.changeName(“王丽华”);(3) (“襄樊市”);emp.changeNo(5);(4);}void changeName(String name){this.name=name;}void changeStreet(String street){this.street=street;}void changeCity(String city){this.city=city;}void changeProv(String prov){this.prov=prov;}void changeNo(int no){(5);}void display(){System.out.println(“输出记录:”+this.no);System.out.Println(“姓名:”+this.name);System.out.println(“街道地址:”+this.street);System.out.println(“市:”+this.city);System.out.println(“省:”+this.prov);System.out.println(“邮政编码:”+this.post);}}
publicclassSyncTest{publicstaticvoidmain(Stringargs){finalStringBuffers1=newStringBuffer();finalStringBuffers2=newStringBuffer();newThread(){publicvoidrun(){synchronized(s1){s2.append(A”);synchronized(s2){s2.append(B”);System.out.print(s1);System.out.print(s2);}}}}.start();newThread(){publicvoidrun(){synchronized(s2){s2.append(C”);synchronized(s1){s1.append(D”);System.out.print(s2);System.out.print(s1);}}}}.start();}}Whichtwostatementsaretrue?()
这个c++程序中char city[20]; 的作用是什么 ? #includefstream#includeiostreamusingnamespacestd;intmain(){fstreaminout;inout.open("city.txt",ios::out);inout"Dallas""""tonghua""""长春""";inout.close();inout.open("city.txt",ios::app|ios::out);inout"罗马""""巴黎""";inout.close();charcity[20];inout.open("city.txt",ios::in);while(!inout.eof()){inoutcity;coutcity"";}inout.close();system("PAUSE");return0;}
建立一个供应商、零件数据库。其中“供应商”表S(Sno,Shame,Zip,City)分别表示:供应商代码、供应商名、供应商邮编、供应商所在城市,其函数依赖为:Sno→(Sname,Zip, City),Zip→City。“供应商”表S属于(16)。A.1NFB.2NFC.3NFD.BCNF
设销售数据模型如下:厂家S(SNO,SNAME,CITY)产品P(PNO,PNAME,COLOR,WEIGHT)工程J(JNO,JNAME,CITY)销售SPJ(SNO,PNO,JNO,QTY)用SQL完成查询:与“双青”在同一城市的厂家名.
4、基于教学视频中的供应商零件数据库,能正确查询出“没有使用天津供应商生产的红色零件的工程号”的关系代数表达式是()。A.πJNO(J) - πJNO (σCITY='天津' (S) ∞SPJ ∞σCOLOR='红' (P))B.πJNO (σCITY≠'天津' (S) ∞SPJ ∞σCOLOR≠'红' (P))C.πJNO(J) - πJNO (σCITY='天津'∧COLOR='红'(S∞SPJ ∞P))D.πJNO (σCITY≠'天津' ∧COLOR≠'红' (S∞SPJ ∞P))
基于教学视频中的供应商零件数据库,能正确查询出“没有使用天津供应商生产的红色零件的工程号”的关系代数表达式是()。A.πJNO(J) - πJNO (σCITY='天津' (S) ∞SPJ ∞σCOLOR='红' (P))B.πJNO (σCITY≠'天津' (S) ∞SPJ ∞σCOLOR≠'红' (P))C.πJNO(J) - πJNO (σCITY='天津'∧COLOR='红'(S∞SPJ ∞P))D.πJNO (σCITY≠'天津' ∧COLOR≠'红' (S∞SPJ ∞P))
下列Moore型状态机采用Verilog语言主控时序部分正确的是:A.always@(posedge clk or negedge reset) begin if(!reset) current_state<=s0; else current_state<=next_state; endB.always@(posedge clk ) begin if(!reset) current_state<=s0; else current_state<=next_state; endC.always@(posedge clk t) if(reset) current_state<=s0; else current_state<=next_state;D.always@(posedge clk or negedge reset) if(reset) current_state<=s0; else current_state<=next_state;