下面用if语句统计“成绩(score)优秀的男生以及不及格的男生”的人数,正确的语句为_____。 A: if(gender=="男" and score <60 or score>=90): n+ = 1 B: if(gender=="男" and score <60 and score>=90): n+ = 1 C: if(gender=="男" and (score <60 or score>=90)): n+ = 1 D: if(gender=="男" or score <60 or score>=90): n+ = 1
下面用if语句统计“成绩(score)优秀的男生以及不及格的男生”的人数,正确的语句为_____。 A: if(gender=="男" and score <60 or score>=90): n+ = 1 B: if(gender=="男" and score <60 and score>=90): n+ = 1 C: if(gender=="男" and (score <60 or score>=90)): n+ = 1 D: if(gender=="男" or score <60 or score>=90): n+ = 1
给出一百分制成绩,要求输出成绩等级A,P,N。其中:90分以上为A,60-89为D,60分以下为E。定义变量score代表成绩,grade变量代表等级。下面正确的语句是() A: if(score>=90) grade='A'; if(score>=60) grade='P'; if(score<60) grade='E'; B: if(score>=90) grade='A'; if(score<90 && score>=60) grade='P'; if(score<60) grade='E'; C: if(score>=90) grade=A; else if(score>=60) grade=P; else grade=E; D: if(score>=90) grade='A'; else (score<90 && score>=60) grade='P'; else (score<60) grade='E';
给出一百分制成绩,要求输出成绩等级A,P,N。其中:90分以上为A,60-89为D,60分以下为E。定义变量score代表成绩,grade变量代表等级。下面正确的语句是() A: if(score>=90) grade='A'; if(score>=60) grade='P'; if(score<60) grade='E'; B: if(score>=90) grade='A'; if(score<90 && score>=60) grade='P'; if(score<60) grade='E'; C: if(score>=90) grade=A; else if(score>=60) grade=P; else grade=E; D: if(score>=90) grade='A'; else (score<90 && score>=60) grade='P'; else (score<60) grade='E';
对于关系模式S(Sno,Sname,Age,Dept),C(Cno,Cname,Teacher),SC(Sno,Cno,Score),下列查询结果相同的是( )。I.πSname((S) ∞σScore>60(SC)) II.πSname(σScore>60(S∞SC)) III.σScore>60 (πSname (S∞ SC)) IV.σScore>60 (πSname (S)∞ (SC)) A: I与II B: III与IV C: I与III D: II与IV
对于关系模式S(Sno,Sname,Age,Dept),C(Cno,Cname,Teacher),SC(Sno,Cno,Score),下列查询结果相同的是( )。I.πSname((S) ∞σScore>60(SC)) II.πSname(σScore>60(S∞SC)) III.σScore>60 (πSname (S∞ SC)) IV.σScore>60 (πSname (S)∞ (SC)) A: I与II B: III与IV C: I与III D: II与IV
查询成绩在60-80之间的学生信息,正确的语句是? A: db.students.find({"score":{$gte:60,$lte:80}}) B: db.students.find({"score":{$gte:80},{"score":{$lte:60}}}) C: db.students.find({"score":{$gte:60},{"score":{$te:80}}}) D: db.students.find({"score":{$gt:80},{"score":{$lt:60}}})
查询成绩在60-80之间的学生信息,正确的语句是? A: db.students.find({"score":{$gte:60,$lte:80}}) B: db.students.find({"score":{$gte:80},{"score":{$lte:60}}}) C: db.students.find({"score":{$gte:60},{"score":{$te:80}}}) D: db.students.find({"score":{$gt:80},{"score":{$lt:60}}})
关于该表达式CHECK(score>=0 AND score<=100),下列叙述中错误的是( )。 A: CHECK是能够单独执行的SQL语句 B: 该表达式定义了对字段score 的约束 C: score的取值范围为0-100(包含0和100) D: 更新表中数据时,检查score的值是否满足CHECK约束
关于该表达式CHECK(score>=0 AND score<=100),下列叙述中错误的是( )。 A: CHECK是能够单独执行的SQL语句 B: 该表达式定义了对字段score 的约束 C: score的取值范围为0-100(包含0和100) D: 更新表中数据时,检查score的值是否满足CHECK约束
查询软件开发专业成绩在80分(包含)以上的学生人数,正确的语句是? A: db.students.find({"major":"软件开发","score":{$gt:80}}).count() B: db.students.find({"major":"软件开发","score":{$gte:80}}).count() C: db.students.find({"major":"软件开发","score":{$gte:80}}) D: db.students.find({$or:[{"major":"软件开发"},{"score":{$gte:80}}]}).count()
查询软件开发专业成绩在80分(包含)以上的学生人数,正确的语句是? A: db.students.find({"major":"软件开发","score":{$gt:80}}).count() B: db.students.find({"major":"软件开发","score":{$gte:80}}).count() C: db.students.find({"major":"软件开发","score":{$gte:80}}) D: db.students.find({$or:[{"major":"软件开发"},{"score":{$gte:80}}]}).count()
已知一张表student存储在HBase中,查找student表中id:2015001的{score:math}成绩,其id作为行键,正确的命令是 A: get 'student', '2015001', 'score:math B: get 'student', '2015001', {COLUMN=>'score:math'} C: get 'student', '2015001', {COLUMN='score:math'} D: get 'student', '2015001', {'score:math'}
已知一张表student存储在HBase中,查找student表中id:2015001的{score:math}成绩,其id作为行键,正确的命令是 A: get 'student', '2015001', 'score:math B: get 'student', '2015001', {COLUMN=>'score:math'} C: get 'student', '2015001', {COLUMN='score:math'} D: get 'student', '2015001', {'score:math'}
if score >= 60.0: grade = 'D'elifscore >= 70.0: grade = 'C'elifscore >= 80.0: grade = 'B'else : grade = 'A'分析以上程序,输出等级为‘A’的输入是: A: 95 B: 100 C: 30 D: 90
if score >= 60.0: grade = 'D'elifscore >= 70.0: grade = 'C'elifscore >= 80.0: grade = 'B'else : grade = 'A'分析以上程序,输出等级为‘A’的输入是: A: 95 B: 100 C: 30 D: 90
下面代码的输出结果是()。 <?php $score=87; if($score>=90 && $score<=100){$grade="优秀";} if($score>=80){$grade="良好";} if($score>=70){$grade="一般";} if($score>=60){$grade="及格";} else{$grade="不及格";} echo $grade; ?>
下面代码的输出结果是()。 <?php $score=87; if($score>=90 && $score<=100){$grade="优秀";} if($score>=80){$grade="良好";} if($score>=70){$grade="一般";} if($score>=60){$grade="及格";} else{$grade="不及格";} echo $grade; ?>
以下参数传递正确的是: A: def score(mid_score, end_score): ……score(88, 79) B: def score( *,mid_score, end_score, mid_rate=0.4): ……score(88, 79) C: def score( *,mid_score, end_score, mid_rate=0.4): ……score(end_score = 79, mid_score = 88) D: def score( *,mid_score, end_score, mid_rate=0.4): ……score(mid_score = 88, end_score = 79,0.5)
以下参数传递正确的是: A: def score(mid_score, end_score): ……score(88, 79) B: def score( *,mid_score, end_score, mid_rate=0.4): ……score(88, 79) C: def score( *,mid_score, end_score, mid_rate=0.4): ……score(end_score = 79, mid_score = 88) D: def score( *,mid_score, end_score, mid_rate=0.4): ……score(mid_score = 88, end_score = 79,0.5)