第13题: [单项选择]What does the man mean A. They always agreed on the same points. B. They both arrived at the same moment. C. He met with Amanda five more times. D. He took Amanda to both plays. 参考答案:B 答案解析:[听力原文]
W: Did you and Amanda really meet at exactly five minutes to two in front of the theatre
M
第16题: [单项选择]脑动脉硬化血流流速曲线图形常表现为()。 A. 正常流速曲线 B. 极小收缩峰流速曲线 C. 舒张期逆行血流流速曲线 D. 收缩峰峰顶圆隆,峰时延长流速曲线 E. 高阻力频谱 参考答案:D
第17题: [单项选择]实现“取消用户USER4对学生表STUD中学号(XH)的修改权限”这一功能的SQL语句是( )。 A. REVOKE UPDATE (XH) B. REVOKE UPDATE (XH) C. REVOKE UPDATE (XH) D. REVOKE ALL PRIVILEGES 参考答案:C 答案解析:[分析] 在SQL中取消用户对数据的权限的命令是REVOKE UPDATE ()。本题中括号内的参数应该是XH,取消的用户是USER4,取消的操作权限是STUD,位置是在TABLE表上。所以全部正确的