Machines that use hydraulic pressure including elevators, dentist chairs, and automobile brakes.

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问题 Machines that use hydraulic pressure including elevators, dentist chairs, and automobile brakes.

选项 A、exclude
B、excluding
C、include
D、are included

答案C

解析 划线部分应填本句的谓语动词(machines是主语,that use hydraulic pressure是定语),根据句意,谓语动词应表“包括”之意,且在此不表被动,因此选项C是答案。
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