可以用脚踏已点燃的导火索。
在PowerPoint 2003,删除幻灯片的选项在()菜单中。 ["编辑","视图","格式","幻灯片放映"]
It is not the Charterer’s duty that(). ["he must procure a cargo and bring it alongside the vessel","he must load a full and complete cargo","he must load in the time stipulated","he must have the vessel tightly secured to the quay where the loading is to take place"]
控制爆破的缓冲原理是指多打眼、少装药,多段起爆。
荠菜胚胎发育的的第一个阶段是形成什么?() ["球型胚","心形胚","不定形胚","胚柄"]
论述传输设备个单板运行灯(RUN)的几种状态和各状态的含义。