When a weight was applied,only one thread broke—so the spider could do small repairs.Removing up to 10 percent of the threads from various areas made the web not weaker but actually up to 10 percent stronger.
Scientists have already been able to show how spider silk is up to five times as strong as the same weight of steel.They found that webs contain two types of silk.The first is stiff and dry and it is used in threads which spread out from the centre.The second is stickier and is referred to as“viscid silk”.This type of line is used to create the spiral(螺旋的)threads which are mainly used to trap food.
科学家们已经找到了蜘蛛网拥有如此强大力量的原因。
1.The scientists’findings could be helpful for people when they______.
A.plan to design a complex web
B.want to design stronger materials
C.decide to live a life without damage
D.hope to make a breakthrough in science
解析:细节理解题。根据第一段...they claim the findings could be used to help design a new generation of super strength materials可知,答案为B项。
答案:B
2.Which of the following is a characteristic of a spider’s web?A.It can adapt to different loads.
B.It can expand itself in the sun.
C.It can mend itself if necessary.
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