若有以下定义:structstudent{charid[20];charname[20];intscore;};structstudents1;则引用结构体变量成员时,不正确的是? A: scanf("%s",s1.id); B: gets(s1.name); C: scanf("%d",score); D: gets(s1.id);
若有以下定义:structstudent{charid[20];charname[20];intscore;};structstudents1;则引用结构体变量成员时,不正确的是? A: scanf("%s",s1.id); B: gets(s1.name); C: scanf("%d",score); D: gets(s1.id);
name="Zhang";ID="123"不能输出"zhang的ID号是123"结果的代码是 A: print(name,"的ID号是",ID,sep="") B: print(name+"的ID号是"+ID) C: print("%s的ID号是%s"%(name,ID)) D: print("%s的ID号是%s",%(name,ID))
name="Zhang";ID="123"不能输出"zhang的ID号是123"结果的代码是 A: print(name,"的ID号是",ID,sep="") B: print(name+"的ID号是"+ID) C: print("%s的ID号是%s"%(name,ID)) D: print("%s的ID号是%s",%(name,ID))
执行语句“a,b=1,1”后,以下结论正确的是( )。 A: id(a)、id(b)、id(1)各不相等 B: id(a)=id(b),但不同于id(1) C: id(a)=id(1),但不同于id(b) D: id(a)、id(b)、id(1)均相等
执行语句“a,b=1,1”后,以下结论正确的是( )。 A: id(a)、id(b)、id(1)各不相等 B: id(a)=id(b),但不同于id(1) C: id(a)=id(1),但不同于id(b) D: id(a)、id(b)、id(1)均相等
考虑如下数据集,其中Customer ID(顾客id),Transaction ID(事务id),Items Bought(购买 项)。如果将每个事务id看成一个购物篮,计算项集{e}, {b, d}, {b, d, e}的支持度:[img=581x242]17de909be1a6e52.png[/img] A: s({e}) =0.7 s({b, d})= 0.3 s({b, d, e})= 0.3 B: s({e}) =0.8 s({b, d})= 0. 1 s({b, d, e})= 0.1 C: s({e}) =0.8 s({b, d})= 0.2 s({b, d, e})= 0.2 D: s({e}) =0.6 s({b, d})= 0.4 s({b, d, e})= 0.3
考虑如下数据集,其中Customer ID(顾客id),Transaction ID(事务id),Items Bought(购买 项)。如果将每个事务id看成一个购物篮,计算项集{e}, {b, d}, {b, d, e}的支持度:[img=581x242]17de909be1a6e52.png[/img] A: s({e}) =0.7 s({b, d})= 0.3 s({b, d, e})= 0.3 B: s({e}) =0.8 s({b, d})= 0. 1 s({b, d, e})= 0.1 C: s({e}) =0.8 s({b, d})= 0.2 s({b, d, e})= 0.2 D: s({e}) =0.6 s({b, d})= 0.4 s({b, d, e})= 0.3
删除student表中id为1的记录() A: TRUNCATE FROM student where id=1; B: DELETE student where id=1; C: DELETE FROM student where id=1; D: DELETE INTO student where id=1;
删除student表中id为1的记录() A: TRUNCATE FROM student where id=1; B: DELETE student where id=1; C: DELETE FROM student where id=1; D: DELETE INTO student where id=1;
There is ______ ID in the bag. It’s ______ Jill’s.
There is ______ ID in the bag. It’s ______ Jill’s.
删除student表中id为1的记录,下列语句正确的是 A: DELETE student WHERE id=1; B: DELETE FROM student WHERE id=1; C: DELETE FROM student WHERE id:=1; D: DELETE student WHERE id:=1;
删除student表中id为1的记录,下列语句正确的是 A: DELETE student WHERE id=1; B: DELETE FROM student WHERE id=1; C: DELETE FROM student WHERE id:=1; D: DELETE student WHERE id:=1;
定义:令T和S是X上的两个拓扑,称T弱于S(S强于T)若TS.现设T弱于S,令id:X——>X,id(x)=x.以下那句是真的? A: id:(X,T)——>(X,S)是连续的 B: id:(X,S)——>(X,T)是连续的 C: AB都不真
定义:令T和S是X上的两个拓扑,称T弱于S(S强于T)若TS.现设T弱于S,令id:X——>X,id(x)=x.以下那句是真的? A: id:(X,T)——>(X,S)是连续的 B: id:(X,S)——>(X,T)是连续的 C: AB都不真
写出条件查询“表1 里的字段1的id是多少”() A: select * from 表1 where字段1=“值” B: select id from 表1 where字段1=“值” C: select id from 字段1 where表1=“值” D: select id from 表1
写出条件查询“表1 里的字段1的id是多少”() A: select * from 表1 where字段1=“值” B: select id from 表1 where字段1=“值” C: select id from 字段1 where表1=“值” D: select id from 表1
下列关于匿名类正确的是()。 A: Listlist=new{Id=1,Name="张三"}; B: varstu=newStudent{Id=1,Name="张三"}; C: varstu=new{Id=1,Name="张三"}; D: publicclassvar{}varstu=new{Id=1,Name="张三"};
下列关于匿名类正确的是()。 A: Listlist=new{Id=1,Name="张三"}; B: varstu=newStudent{Id=1,Name="张三"}; C: varstu=new{Id=1,Name="张三"}; D: publicclassvar{}varstu=new{Id=1,Name="张三"};