What did the researchers find in the experiment？A．Human walking used more energy than bipe
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What did the researchers find in the experiment？
A．Human walking used more energy than bipedal walking in chimps.
B．One chimp used about the same energy in walking on two legs as on all fours.
C．Two chimps used more energy walking on two legs.
D．Three chimps used less energy walking on two legs.
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正确答案：B
解析：第五段具体介绍了研究结果，“One spent about the same energy walking on two legs as on all fours.”一只黑猩猩在两足和四足行走时所耗能量相等。