在地形图上，长度和宽度都不依比例尺表示的地物符号是（） ["半依比例符号","地物注记","比例符号","非比例符号"]
胶圈接口时，纵坡大于（）％时，应采取防止管道下滑的措施。 ["12","15","18","20"]
按重力相似准则设计模型，若几何比尺为25，则流速比尺为（）。 ["10","20","5","100"]
When configuring QoS on a wireless controller， the per-user， real-time bandwidth contract isenforced for which of the following protocols？（） ["IPX","IP","UDP","TCP"]
评价一种化疗药物的临床价值，主要采用下列哪项指标（） ["抗菌谱","抗菌活性","最低抑菌浓度","最低杀菌浓度","化疗指数"]
结合实例，谈谈在广告的撰写中主要应当依循哪些要求？
