第32题: [单项选择]Striking feature of the UN Conference on Drug Abuse is that______. A. the delegates were unprecedentedly unanimous in their attempt to control drag abuse B. the conference touched upon many issues in the world C. it was held by many countries D. two documents were signed 参考答案:A 答案解析:事实细节题。见第一段第二句,As nerve before,the nations of the world demonstrated a willingness to put aside ideol
第34题: [单项选择]为设备表增加一个“设备总金额N(10,2)”字段,正确的命令是 A. ALTER TABLE设备表ADD FIELDS设备总金额N(10,2) B. ALTER TABLE设备表ADD设备总金额N(10,2) C. ALTER TABLE设备表ALTER FIELDS设备总金额N(10,2) D. ALTER TABLE设备表ALTER设备总金额N(10,2) 参考答案:B 答案解析:【解析】在SQL语句中,为表增加字段应使用关键字ADD,而不是ADD FIELDS。ALTER是用来修改已有的字段,不能用来新增一个字段。
第38题: [单项选择]下列选项中,与函数INT(10/3)结果相同的是 A. CELING(3.3) B. FLOOR(3.3) C. SIGN(3.3) D. ABS(3.3) 参考答案:B 答案解析:[解析]INT()函数的功能是取数值的整数部分,CEILING()函数是返回大于或是等于自变量的最小整数,不影响负号。FLOOR()函数的功能是返回小于或等于自变量的最大整数,不影响负号。ABS()函