When the import declaration is conducted, the person in charge of the matter should submit, together with the import declaration form, the following commercial and shipping documents, they are ______.

A．Invoice and B/L only

B．Invoice, B/L, Packing list only

C．Invoice, B/L, Packing list, the duty exemption certificate issued by Customs

D．none of the above

下列程序段的功能是实现“学生”表中“年龄”字段值加1：
Dim Str As String
Str="[ ]"
Docmd.RunSQL Str
括号内应填入的程序代码是______。

A．年龄=年龄+1
B．Update学生Set年龄=年龄+1
C．Set年龄=年龄+1
D．Edit学生Set年龄=年龄+1