Fireworks中的橡皮图章工具,按住()键进行源的选择。 ["Alt","Ctrl","Shift","Tab"]
()是植食性害虫。 ["蝗虫","步行虫","虎甲","蚕"]
()是捕食性昆虫。 ["蝗虫","步行虫","小地老虎","蚕"]
在水平线属性面板中,不能设置水平线的()。 ["宽度","高度","颜色","阴影"]
昆虫的头部一般由()个体节愈合而成。 ["3","4","5","6"]
已知在型钢轧机上热轧,轧辊线速度〈2.5m/s,轧辊工作直径为650mm,咬入角为20度,求允许最大压下量?(cos20=0.94)