《联合国国际货物销售合同公约》是衡量国际贸易合同是否有效的法律依据。（）

某公路工程进行招标投标，业主成立了招标工作组，负责对招标工作中的重大问题进行决策并处理各方面的关系，接着确定招标方式、合同形式和合同段后，并据此制订工作计划。业主委托了招标代理机构编写了指标公告，并在指定的媒介发布。接着招标代理机构编制了招标文件进行发售，招标文件发售结束后，向购买招标文件的投标人进行资格预审。
问 题：

招标公告的内容主要有哪些

管网的水头损失为各管道的（）和局部损失之和。

We should let more young parents and their children can enjoy scientific early education.()

A. provide more young parents and their children to enjoy early education

B. provide more young parents and their children to enjoy early education and scientific

C. provide young parents and their children enjoy more scientific early education

D. provide young parents and their children with more early education services

芬兰传统民居的典型特点是（）

A.木墙承重，厚木为屋顶

B.蒸汽浴室术屋

C.木质的农庄水车

D.天然集聚太阳能的半地下建