【单选题】Please confirm your attendance ________ by July 20, 2009.
【单选题】If you find our concesion ___, please confirm your acceptance by fax.
【判断题】为 控制切屑流向待加工表面,加工通孔 时 ,采用 负 刃 倾 角的内孔 车 刀;加工盲孔 时 , 应 采用正的刃 倾 角。
【单选题】If you find our concession ____, please confirm your acceptance by fax.
【单选题】Please confirm your attendance ________ by July 20, 2009.
【单选题】Please confirm your attendance ________ by July 20, 2018.
【单选题】Please confirm your attendance ________ by July 20, 2019.
【单选题】Please confirm your attendance——by July 20, 2009.