【判断题】为了保证安全,几乎所有的轨道电路都采用开路式。
【判断题】The first intergrated circuit was developed in the 1960s.
【单选题】在 Windows7 中 , 当鼠标形状变为指针和问号的组合时 , 意味着 : ( )
【单选题】在Windows 7中,当用户处于等待状态时,鼠标呈( )。
【判断题】An intergrated PDM system can facilitate a new mold development.
【单选题】在Windows 7中,当用户处于等待状态时,鼠标呈( )形。
【单选题】在Windows 7中,当鼠标形状变为指针和问号的组合时,意味着:
【判断题】The purpose of intergrated tourism is to improve people's quality of life through tourism.