第27题: [单项选择]Machines that use hydraulic pressure including elevators, dentist chairs, and automobile brakes.
A. exclude B. excluding C. include D. are included 参考答案:C 答案解析:[解析] 本题考查结构应用。分析句子结构可知,that use hydraulic pressure为定语从句,修饰主语Machines。所填部分为此句的谓语,且不表被动。句意为:使用液压的机器包括电