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

A．twice as large an island as that

B．twice as larger as that island

C．as twice large as that one

D．twice as a large island as that

具有一定镇咳、祛痰、平喘作用的药物是（）

A、鸡内金

B、麦芽

C、山楂

D、神曲

E、莱菔子