要向Data.dat 文件中添加数据，下面语句中正确的是______ 。 A: Open "Datdat" For OutputAs #1 B: Open "Datdaf' For InputAs #1 C: Open Datdat For OutputAs #I D: Open Datdar For Append As #1

创建存储过程如下：Create proc bookproc @id int ,@title char(20) outputAs Select @title=title from book where id=@id执行该存储过程的方法正确的是（ ） A: Exec bookproc 1,@title outputPrint @title B: exec bookproc @id=1,@title outputPrint @title C: declare @title char(2)Exec bookproc 1,@title outputPrint @title D: declare @title char(20)Exec bookproc @id=1,@title outputPrint @title