even feel pain. Right?

　　Actually, they just might. That's the conclusion of a new

　　study published in the Journal of Experimental Biology. Robert W. Elwood and Barry Magee of Queen's University in Belfast examined the reaction of common shore crabs to small electrical

　　shocks.

　　Ninety crabs were placed in a brightly lit area and were given the choice of moving to one of two dark shelters. (Shore crabs like to hide in dark, tight spaces.) Once they'd made their choice, the crabs in one of the shelters were exposed to an electric shock. After a rest period, the crabs were returned to the lit tank.

　　Most of the crabs went back into the dark shelters, and then the same crabs were given another electric shock. When they were placed back into the lit tank for the third time, the majority of the shocked crabs instead went to the other dark shelter,

　　avoiding the one where they had repeatedly been shocked.

　　As Elwood put it, the crabs' choice indicated they wanted to escape the shocks:

　　having experienced

　　two rounds of shocks, the crabs learned to avoid the shelter where they received the shock. They were willing to give up their hideaway in order to avoid the source of their probable pain.

　　1．According to the author, people cook the crab alive due to the belief that ________.

　　A．it is not guilty to treat a crab cruelly

【2017届湖北专版高考英语一轮复习讲义：Unit3《Underthesea》（新人教版）选修7（课前基础导练+课堂互动探究+课后知能提升）】相关文章：

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