【单选题】V 带传动中,选取V带型号主要取决于 。
【判断题】Mass media may take the form of broadcast media, print media and Internet media.
【简答题】标注圆的直径尺寸时,应在尺寸数字前加注直径符号“ ”。
【判断题】Print media, electronic media and the Internet are forms of mass media.
【单选题】在公共场所乘坐手扶电梯要靠____站,把旁边的通道让给那些需要快行的人,这就是约定俗成的“电梯札仪"。
【单选题】I have been convinced that the print media are usually more __________ and more reliable than television.
【单选题】I have been convinced that the print media are usually more ________ and more reliable than television. [ ]
【单选题】标注圆的直径尺寸时,应在直径数字前加注符号( ):