某一蔬菜店出售的土豆每公斤计4元,如果4个土豆重1公斤,问200元钱可买多少个土豆( )
A.200
B.50
C.160
D.400
参考答案:A
石海和石河
在窗体上画一个名为Command1的命令按钮,其Command1_Click事件过程如下。 Sub Command1_Click() Dim student As studtype Dim record_no As Integerrecord n=1With student .ino=12 .strname="Smith" .strsex=“男” .smark=89 End With ______ Put # 1,record_no,student Close # 1 End Sub 要求在c:\的随机文件student..dat写入一条记录。应在程序中空行处填入以下哪条语句使该功能完整
A.Open"c:\student.dat"For Input As # 1 len=len(student)
B.Open"c:\student.dat:For random As # 1 len=len(student)
C.Open"c:\student.dat"For Output As # 1 len=len(student)
D.Open"c:\student.dat"For Append As # 1 len=len(student)