在常用的传输介质中,带宽最宽、信号传输衰减最小,抗干扰能力最强的一类传输介质是(). ["双绞线","无线信道","光纤","同轴电缆"]
关于流体微团的说法系列正确的是:() ["测量流体密度的时候,所选取流体的体积越大,测量的精度越高,流体的密度测得越准确。","由连续质点组成的质点系称为流体微团。","流体微团的形状是任意的,是变形体,故流体微团不可以承受切向力。","流体微团的体积是任意的,只要相对与飞行器而言很微小就可以"]
一台设备原值为100万元,累计折旧30万元,未计提减值准备。假定各年税法折旧与会计折旧相等,此时该项设备的计税基础为()。 ["100万元","30万元","70万元","0"]
You are implementing an ASP.NET page that includes the following drop-down list. You need to dynamically add values to the end of the drop-down list. What should you do? () ["Add the following OnPreRender event handler to the asp:DropDownList

","Add the following OnPreRender event handler to the asp:DropDownList

","Add the following event handler to the page code-behind.

","Add the following event handler to the page code-behind.

"]
塔式起重机卷筒有下列情况之一,应予报废() ["裂纹或轮缘破损","卷筒槽壁磨损量达原壁厚的10%","卷筒有锈","卷筒壁有轻微磨损"]
管理对信息和信息处理的要求主要有四个方面,即准确性、及时性、()和()。