登高安全工具试验周期如何规定（）。 ["安全带、安全绳、竹（木）梯等外表检查每月一次","竹（木）梯试验负荷每半年一次","安全带、安全绳试验静拉力每半年一次","以上都不对，没有具体规定"]
1946年，谁编写出版了我国第一本《广告学》？（） ["吴铁声","张庶平","唐忠朴","徐百益"]
自定义三管塔模块价格按照（）来计价。 ["吨","米","立方米","平方米"]
A more sophisticated pressure reducing valve incorporates a pilot valve which controls the fluid above the valve operating piston in response to downstream pressureThe bold and italic word “which” means （）. ["a pressure reducing valve","a pilot valve","an operating piston","downstream pressure"]
“单站核算”投资成本项数据来源于（） ["项目管理系统","CRM系统","财务核算系统","物业系统"]
物资采购项目包括哪些内容？申报审批是如何规定的？
