建筑钢材的主要钢种有（）。 ["低合金低强度结构钢","优质碳素结构钢","高合金高强度结构钢","低合金高强度结构钢","碳素结构钢"]
简述以下水库特征水位和库容的意义：正常蓄水位；死水位；兴利库容。
凡向投资人募集资金而形成的资金集合体都可以称为证券投资基金。
Your computer connects to both an ad hoc wireless network and a wired network. You need to allow other wireless clients to access the wired network. What should you do?（） ["A","B","C","D"]
互感器巡视项目有哪些？
经纬仪测图时，展绘碎部点平面位置需要（）和（）两个参数
