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)
已知三阶矩阵$A$满足$\mid A-E\mid=\mid A-2E\mid=\mid A-3E\mid=0$,则$\mid A\mid$=( )。 A: $4$ B: $6$ C: $12$ D: $3$
已知三阶矩阵$A$满足$\mid A-E\mid=\mid A-2E\mid=\mid A-3E\mid=0$,则$\mid A\mid$=( )。 A: $4$ B: $6$ C: $12$ D: $3$
设$A,B$是$n$阶正交矩阵,且$\mid A\mid=-\mid B\mid$,则( ). A: $A+B$可逆 B: $A+B$不可逆 C: $\mid A+B\mid=1$ D: $\mid A+B\mid=-1$
设$A,B$是$n$阶正交矩阵,且$\mid A\mid=-\mid B\mid$,则( ). A: $A+B$可逆 B: $A+B$不可逆 C: $\mid A+B\mid=1$ D: $\mid A+B\mid=-1$
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 $grade; ?>
Excel2010从18份身份证号中获取出生日期可以使用()函数。 A: MID(A1,6,8) B: MID(A1,7,8) C: =MID(A1,6,8) D: =MID(A1,7,8)
Excel2010从18份身份证号中获取出生日期可以使用()函数。 A: MID(A1,6,8) B: MID(A1,7,8) C: =MID(A1,6,8) D: =MID(A1,7,8)
There are ________students playing basketball in the room. A: score of B: scores of C: two score D: two score of
There are ________students playing basketball in the room. A: score of B: scores of C: two score D: two score of
若有定义int score[10];,则对score数组中的元素的正确引用是( ) A: score[10] B: score[6.0] C: score[0] D: score(7)
若有定义int score[10];,则对score数组中的元素的正确引用是( ) A: score[10] B: score[6.0] C: score[0] D: score(7)
从学生成绩表SC中查询平均成绩大于60分的同学的学号和平均成绩的正确语句为: A: selectsno,avg(score)assscorefromscgroupbysnohavingavg(score)>60 B: selectsno,avg(score)assscorefromscgroupbysnowhereavg(score)>60 C: selectsno,avg(score)assscorefromscwhereavg(score)>60 D: selectsno,avg(score)assscorefromschavingavg(score)>60
从学生成绩表SC中查询平均成绩大于60分的同学的学号和平均成绩的正确语句为: A: selectsno,avg(score)assscorefromscgroupbysnohavingavg(score)>60 B: selectsno,avg(score)assscorefromscgroupbysnowhereavg(score)>60 C: selectsno,avg(score)assscorefromscwhereavg(score)>60 D: selectsno,avg(score)assscorefromschavingavg(score)>60
查询成绩在60-80之间的学生信息,正确的语句是? A: db.students.find({"score":{$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":{$lt:60}}})
查询成绩在60-80之间的学生信息,正确的语句是? A: db.students.find({"score":{$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}}})
船舶电台海上移动业务识别码的组成是( )。 A: MID X1X2X3X4X5X6 B: 0 MID X1X2X3X4X5 C: 00 MID X1X2X3X4 D: 00 MID X1X2X3X4X5
船舶电台海上移动业务识别码的组成是( )。 A: MID X1X2X3X4X5X6 B: 0 MID X1X2X3X4X5 C: 00 MID X1X2X3X4 D: 00 MID X1X2X3X4X5