探究小组利用下图装置进行四组实验，胶头滴管盛装的是溶液，烧瓶中盛装的是气体、固体或液体，当胶头滴管滴几滴液体后，能观察到气球（气球系在与外界相通的玻璃管一端）变大的实验组合是

       滴管中            烧瓶中

A． HCl 溶液          Fe

B． HCl溶液           CaCO₃

C． Ca(OH)₂溶液    CO₂

D． H₂O₂溶液        MnO₂

（）is any cargoes that are transported in a loose form without any packaging in large quantities.

A.General cargo

B.Bulk cargo

C.Container

D.Awkward cargo