3. D 推理题。根据短文最后一段的意义：国际社会施以援手是抑制灾情的唯一方法。由此推理可得“国际援助迫在眉睫”。

　　4. C 主旨题。根据短文第一段的描述及下文的阐发可看出本文的主题是“非洲西部的虫灾”。

　　B段

　　The pound new Library of Birmingham（LoB）will be the most visible sign of Providing 24-hour services which can be used through, many different ways. It is important to enable us to reach more people, more effectively.”

　　The digital library will, he says, be as important as the physical one, allowing the distant use of the services, making sure that it is never closed to the public.

　　Even before the LoB is complete, the public has been able to go online to visit the Virtual（虚拟的）LoB, designed by Baden, the Birmingham virtual worlds specialists. Not only have the public been able to learn about LoB, but the virtual one has also enabled those working on the LoB to understand the building and how it will work before it even opens.

　　Two other small Birmingham-based digital companies are working on the LoB projects. Substrat, a digital design company, is developing what it calls an example of an “enlarged

　　reality” project. It is about the use of an exciting smart phone, an important part of the

　　which is the early stages of development

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