题目内容
2.Now a team,headed by Markus Buehler,a scientist at the Massachusetts Institute of Technology,has worked out why the spider web is so strong.It is not just the strength of the thread,but the clever design of the web.The key to a web's success is its ability to keep its shape and strength even after some of the threads break,says Buehler.The scientists found the thread itself has the ability to become softer or firmer.So it can hold different types of heavy things and bear a localized damage (损坏).This localized damage can simply be repaired,rather than replaced,or even left alone if the web continues to work as before.
Buehler's research is mostly theoretical (理论上的),based on computer modeling of material properties (特性) and how they respond to stresses.But in order to test the findings,he and his team literally went into the field.They tested actual spider webs by poking and pulling at them.In all cases,damage was limited to the immediate area they disturbed.
In tests,scientists also used three other strong materials made into the same webs.The spider thread was six times stronger than any other material.More surprisingly,when the scientists took away up to 10percent of the threads from different places,the web didn't become any weaker.Actually,it became up to 10 percent stronger.
The spider web's clever design gives scientists many new ideas.The findings might be used not just for physical objects such as safer buildings,but also in the design of networked systems.For example,a computer experiencing a virus attack could be designed to shut down at once,before its problems get worse."It's a really good chance,"said Buehler."It may give us some new ideas for engineering."
56.Where does the strength of the web threads come from?D
A.Their high stickiness.
B.Their high firmness.
C.Their clever design.
D.Their ability to change in quality.
57.Which word is closest in meaning to the word"disturb"in the 3rd paragraph?A
A.Upsetting.
B.Changing.
C.Moving.
D.Hitting.
58.How many different experiments did Buehler's team do to test their findings?C
A.One.
B.Two.
C.Three.
D.Four.
59.What can be the best title for the passage?B
A.Spider Webs Are Stronger than Steel
B.Spider Webs Hold Valuable Secrets
C.How Spider Webs Get Their Strength
D.What Strong Spider Webs Mean to Us.
分析 文章大意:
此片文章主要讲述的是有关蜘蛛丝的性能方面的文章.为了研究蜘蛛丝为什么具有很高的稳定性和延展性,科学家们首先通过计算机模拟来找到影响蜘蛛丝稳定性的原因,之后再到野外在真正的蜘蛛网上做实验,最终确定其稳定的性能来源于其独特的结构,并且其强度由于三种其他材料.
解答 56.D,推理判断题,文中提到"The scientists found the thread itself has the ability to become softer or firmer.So it can hold different types of heavy things"科学家发现,蜘蛛网之所以能够承受重物而存在,是因为它能够根据承受物的性质变软或变硬,由此确定选择D.
57.A,推理判断题,文中提到"They tested actual spider webs by poking and pulling at them"测试条件下是指对蜘蛛网进行戳洞或者拉伸,由此可知是破坏蜘蛛网,upsetting译为打翻,倾覆的意思,由此判断选择A.
58.C,推理判断题,文中提到"They tested actual spider webs by poking and pulling at them"研究者们通过戳洞或拉伸来研究蜘蛛网的性能,"scientists also used three other strong materials made into the same webs"用其他三种材料与蜘蛛网性能做对比,"when the scientists took away up to 10percent of the threads from different places"对蜘蛛网进行拆解后研究其稳定性,所以做了三项测试,由此确定选择C.
59.B,推理判断题,本文是对蜘蛛丝性能猜测及研究的文章,主要讲述了通过一定的方法来验证蜘蛛丝的性能,并且试图找到其中的原因,由此确定选择B.
点评 对于阅读表达题,一定要记得首先通读全文,了解文章大意,然后再根据文章关键词,关键句,掌握细节问题,并进行推理判断,再去回答具体的问题.
--Sorry,we ___________ a movie at the theatre at that time.( )
| A. | watch | B. | were watching | C. | watched | D. | are watching |
| A. | go | B. | went | C. | will go | D. | are going |
| A,safety B.twice C.heavily D.ninth E.homeless F.chatting |
57.Doctor Lee asked me to take the medicinetwicea day.
58.My grandpa likeschatting with neighbors after dinner.
59.The government has done a lot to help thehomeless people after Ya'an earthquake.
60.Foodsafetyis becoming a more and more serious problem in our country.
61.Sonia'sninth birthday is coming and I'm planning a surprise party for her.
| A. | what | B. | how | C. | why | D. | if |