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¡¡¡¡The researchers studied the behaviour of female brown capuchin monkeys. They look cute. They are good-natured, cooperative creatures, and they share their food tardily. Above all, like their female human counterparts, they tend to pay much closer attention to the value of “goods and services” than males. Such characteristics make them perfect candidates for Dr. Brosnan’s and Dr. de Waal’s study. The researchers spent two years teaching their monkeys to exchange tokens for food. Normally, the monkeys were happy enough to exchange pieces of rock for slices of cucumber. However, when two monkeys were placed in separate but adjoining chambers, so that each could observe what the other was getting in return for its rock, their behaviour became markedly different.

¡¡¡¡2.Female capuchin monkeys were chosen for the research most probably because they are ________¡£

¡¡¡¡[A] more inclined to weigh what they get

¡¡¡¡[B] attentive to researchers’ instructions

¡¡¡¡[C] nice in both appearance and temperament

¡¡¡¡[D] more generous than their male companions

¡¡¡¡¡¾½âÎö¡¿ÎÒÃÇÓÉÌâ¸É¿ÉÒÔ¿´³ö£¬ÒªÇóÕÒ³öÑ¡Ôñ´ÆÐÔ¾íβºï×öʵÑéµÄÔ­Òò£¬²¢ÇÒÊÇmost probably×îÓпÉÄܵÄÔ­Òò£¬ÓÉ´ËÍƶ¨´ð°¸Ó¦¸Ã¶¨Î»ÔÚAbove all, like their female human counterparts, they tend to pay much closer attention to the value of “goods and services” than males. ËùÒÔ´ð°¸Ñ¡ÔñA.

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