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  3. Researchers at Cornell University have demonstrated that homing pigeons can sense changes in the earth’s magnetic field, see lig

Researchers at Cornell University have demonstrated that homing pigeons can sense changes in the earth’s magnetic field, see lig

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问题 Researchers at Cornell University have demonstrated that homing pigeons can sense changes in the earth’s magnetic field, see light waves that people cannot see, detect low-frequency sounds from miles away, sense changes in air pressure, and can identify familiar odors.
选项 A、sense changes in air pressure, and can identify familiar odors
B、can sense changes in air pressure, and can identify familiar odors
C、sense changes in air pressure, and identify familiar odors
D、air pressure changes can be sensed, and familiar odors identified
E、air pressure changes are sensed, and familiar odors identified
答案C
解析 本句是5个动宾并列结构，D、E中并列成分变为句子，错。在该动宾并列结构中，除了第一个由情态动词can连接外，未划线的中间两个谓语动词之前都省去can，因而第四、第五个动词也都应相应省去can，而不应该补出can(“要省全部省”原则，可查阅第十一章中的省略部分)，因而A、B错，C对。
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