【单选题】已知"借阅"表中有"借阅编号"、"学号"和"借阅图书编号"等字段,每名学生每借阅一本书生成一条记录,要求按学生学号统计出每名学生的借阅次数,下列 SQL 语句中,正确的是
A.
SELECT 学号, COUNT( 学号 ) FROM 借阅
B.
SELECT 学号, COUNT( 学号 ) FROM 借阅 GROUP BY 学号
C.
SELECT 学号, SUM( 学号 ) FROM 借阅
D.
SELECT 学号, SUM( 学号 ) FROM 借阅 ORDER BY 学号
【简答题】用条分法分析黏性土坡的稳定性时,需假定几个可能的滑动面,这些滑动面均是最危险的滑动面。
【判断题】对于共阳极结构的显示译码器,当某一字段发光二极管的阴极为低电平时,相应字段就点亮。( )
【简答题】Total absoption cost of sales
【单选题】Christopher bought 4 cans of soup for a total of $3.36,which included sales tax of $0.16. At the same per-can cost, what is the cost before the sales tax is added for 6 cans of the same soup?