As we have known from the map of the world，this is ________.

A．twice as large an island as that

B．twice as large as that island

C．as twice large as that one

D．twice as a large island as that

S48/750机组的传动系统包括：（）

A.叶轮

B.主轴

C.偏航电机

D.液压站

E.齿轮箱

F.高速刹车

G.联轴器

H.发电机