尽管供电中断，医院继续照常工作。

(4)The sofa also functions as a bed.

这沙发还可以当床用。

[归纳拓展]

function n.职能；功能，作用；vi.起作用，正常运转

perform a function发挥功能

special function特殊功能

function as担任，起......作用 [即时跟踪]

(1)The machine won't function properly(正常运转) if you don't oil it well.

(2)A library is functioning as a hospital(充当医院的作用) to deal with the injured people.

(3)This big room can either a living room or a dining room.

A.use to B.serve to C.function as D.change as

答案　C

解析　句意为：这个大房间既能够充当起居室，也可以充当餐厅。function as意为"起......作用，具有......功能"，符合语境，在此处相当于serve as。

3.chief

[语境感悟]

(1)(教材P53)It is of chief importance to our future-and to the future of our nation-for us to learn how to use information technology...

我们学会如何使用信息技术对我们的未来和我们国家的未来都非常重要......

(2)He was recently appointed chief economist at the Bank of Scotland.

他最近被任命为苏格兰银行的首席经济学家。

(3)Most health chiefs believe the reforms have gone too far.

大部分健康专家认为改革做得过火了。

[归纳拓展]

[即时跟踪]

(1)One of the chief causes(最主要的原因) of crime today is drugs.

(2)The police chief(警察局长) ordered that every policeman should keep the gun well.

1.look into