【单选题】下列液压元件中,工作时是将机械能转化为流体压力能的是:()
【多选题】自动生成目录及更改目录的操作步骤可以包括
【单选题】唇形科植物的果实类型为___________
【判断题】国家出台创业扶持政策是为了激励大学生发挥创业主力军作用。
【判断题】Marketing is a job that should be handled by marketers. People in management, accounting, and finance should focus on their own specialties.