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