C．clever and strong

　　D．lovely and careful

　　答案：A　作者观点题。从第五段的最后一句和最后一段的第一句和最后一句可知A项说明了作者的态度。

　　B

　　(2017·东北三省三校第二次联考)

　　Deception (骗术) is something that people do all the time, and it plays an important role in

　　military (军事的) strategy. Now some researchers are trying to figure out how to get robots to do

　　it, by looking at the behavior of squirrels and birds.

　　At Georgia Tech, a team led by Ronald Arkin, a professor at the School of Interactive Computing, studied the literature on squirrels hiding their acorns (橡果). Squirrels will hide their food in a certain place, but when they see other squirrels trying to steal from them, they attempt to fool the thieves by running to a false location.

　　Ronald Arkin and his Ph. D. student Jaeeun Shim used that as a model for robot behavior. They programmed the robot into tricking a “predator (捕食者)” machine by doing what a squirrel does: showing the enemy a false location for an important resource.

　　The team also looked at how other animals—in this case, a species of bird called Arabian babbler—drive off predators. A babbler will make an alarm call when they see a predator and other babblers will join the bird and make more calls. They then surround the predator, all the while flapping (拍打) wings and making noises. The babblers don't ever actually fight the animal they want to drive off; they just make enough noises and flaps around enough so that it seems that attacking a babbler isn't worth it.

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