It is said that Nigeria is      Great Britain.

A．three time the size of

B．the size three times of

C．three times as the size of

D．three times the size of

装卸搬运分类中，按装卸搬运的作业特点分为（）。

A.混合装卸

B.连续装卸

C.间歇装卸

D.水平装卸

E.滚动装卸