文档介绍：北京新东方学校英联邦项目面试试讲题目试讲科目的题目( 从中选取希望试讲科目的相应试题, 其余三科的题目不用再另行准备) LISTENING 剑四到剑七真题任选 READING Spider silk cuts weight of bridges A strong, light bio-material made by genes from spiders could transform construction and industry A Scientists have eeded in copying the silk-producing genes of the Golden Orb Weaver spider and are using them to create a synthetic material which they believe is the model for a new generation of advanced bio-materials. The new material, biosilk, which has been spun for the first time by researchers at DuPont, has an enormous range of potential uses in construction and manufacturing. B The attraction of the silk spun by the spider bination of great strength and enormous elasticity, which man-made fibres have been unable to replicate. On an equal-weight basis, spider silk is far stronger than steel and it is estimated that ifa single strand could be made about 10m in diameter, it would be strong enough to stop a jumbo jet in flight. A third important factor is that it is extremely light. Army scientists are already looking at the possibilities of using it for lightweight, bulletproof vests and parachutes. C For some time, biochemists have been trying to synthesise the drag-line silk of the Golden Orb Weaver. The drag-line silk, which forms the radial arms of the web, is stronger than the other parts of the web and some biochemists believe a synthetic version c