1. From this passage, we can learn that_______。[ A ] a robotic caterpillar can crawl by a pair of rubber rods
[ B ] when a caterpillar moves, the magnetic field moves backwards along it
[ C ] the environment couldn’t influence a robotic caterpillar’s guts, which are wrapped in a capsule
[ D ] crawling is very stable and efficient, and when it moves, only a few elements are needed
2. According to this passage, which is not true about the construction of the robotic caterpillar?
[ A ] A robotic caterpillar is made from a series of rubber capsules tilled with a magnetic fluid.
[ B ] Iron particles, water, and a detergent-like surfactant form a magnetic fluid.
[ C ] Each capsule filled with a magnetic fluid is linked to the next by a pair of rubber rods.
[ D ] In order to keep stable condition, the caterpillar’ s guts are wrapped in a clear, flexible polymer tube.
3. The meaning of the word “peristalsis” in Paragraph 3 is similar to_______。
[ A ] swimming
[ B ] flying
[ C ] crawling
[ D ] walking
4. Comparing the robotic caterpillar and the other robots, which of the following is not true?
[ A ] A smooth surface is indispensable to biped robots and wheeled robots.
[ B ] Flying robots are very inconvenient when moving, because they have too many moving parts.
[ C ] The robotic caterpillar only has robber capsules filled with a magnetic fluid.
[ D ] It’ s incapable for wheeled robots to locate trapped people because they are impossible to miniaturize.
5. The passage is mainly about _______。
[ A ] why a robotic caterpillar can find trapped people
[ B ] how a robotic caterpillar works
[ C ] the instruction of the magnetic caterpillar
[ D ] how a robotic caterpillar crawls
困在砂礫中的地震幸存者將來可能會被日本秋田縣立大學的Saga發(fā)明的一種新型的履帶裝置機器人拯救。它依靠磁場驅動穿越細小砂礫，裝備了燈、照相機，以及傳感器等設備。這種履帶由一系列裝滿含有鐵粒子、水和類似洗潔劑的表面活性劑的橡膠容器制造。它的移動原理是在履帶裝置的“主”容器內，磁力液體涌向磁場，致使容器向外突出，并且使其前后部分抬起。當磁場移動到下一個容器時，第一個容器擺脫束縛，向前彈出，同時下一個容器隆起。依靠這種動力，機器人不斷蠕動前進。這種機器人能耗量高，但是其穩(wěn)定性卻是很好的。
答案及解析
1.B【解析】由第四段第一句“To make the caterpillar move forwards.Saga moves a magnetic field backwards along the caterpillar.”可以看出，磁場會向后移動，從而使機器蟲移動。故應選B。
2.C【解析】由第三段倒數(shù)第二三句“Each capsule is linked to the next by a pair of rubber rods.”可以得出，囊與囊之間由一對橡膠棒連接。故應選c。
3.C【解析】根據(jù)第三段的“the rhythmic contraction that moves food down your intestine”可以推斷{{{peristalsis就相當于crawlin9，意思是“有節(jié)奏的蠕動”。故應選C。
4.D【解析】根據(jù)文章最后一段“wheeled robots require a smooth surface and are difficult to miniaturize”，作者說輪式的機器人在救人的時候，需要一個光滑的平面，而且很難穩(wěn)定。文章并沒有說它不能救人。故應選D。
5.A【解析】文章一開始就說“A robotic caterpillar that burrows its way through debris.”這種新型的機器人在瓦礫中尋找幸存者。接下來，則介紹了它的工作原理，說明它為什么能夠進入砂礫中去救人。故應選A。