【单选题】—Excuse me. Where is Mr. Green's office? —It's on _____ floor. [ ]
【单选题】随机误差的有界性是指在一定的测量条件下,误差的绝对值,( )。
【单选题】—Excuse me. Where is Mr Green’s office? —It’s on ______ floor.
【单选题】There are some students ______ to have known what they don’t really know, which is really harmful to them.
【单选题】I really don't know ______ or to leave.
【单选题】听力原文:Excuse me.Where is the English Department? (2)
【判断题】用户是通过报表实现与系统的交互式操作来操纵数据库。