Greenland is _______ huge island that is mostly covered with_______ thick ice sheet.

A．the; /

B．a; the

C．a; a

D．the; a

下列选项中，属于开标的程序和内容的是( )。

A．密封

B．密封情况检查

C．拆封

D．记录并存档

E．唱标