患儿皮肤白皙、头发色黄、虹膜色浅呈蓝色，被描述为“金发碧眼”特征的精神发育迟滞可诊断为（） ["先天愚型","脆性X染色体综合征","重度精神发育迟滞","苯丙酮尿症","半乳糖血症"]
【背景资料】高新技术企业新建厂区某8层框架结构办公楼工程，采用公开招标的方式选定A公司作为施工总承包，施工合同中双方约定钢筋、水泥等主材由业主供应，其他结构材料及装饰装修材料均有总承包单位负责采购。
施工过程中，发生以下事件：
事件一：钢筋第一批进场时，供货商只提供了出厂合格证，业主指令总承包单位对该批钢筋进行了现场验证，总承包单位对钢材的品种、型号、见证取样进行了质量验证。对钢筋的屈服强度、抗拉强度进行了复试。
事件二：总承包单位按《建筑工程质量管理条例》规定，对商品砼、砂石、砌墙材料、石材、胶合板实行备案证明管理。
请根据上述背景资料完成以下选项本工程总包单位对钢材的品种品种、型号、见证取样进行了质量验证还应对钢材的（）进行质量验证。 ["大小","规格","数量","外观检查"]
Which agent will be selected when the Resource Selection Criteria is set to circular routing?（） ["the agent who has been in the Available state for the longest amount of time ","the next available agent with the highest priority, as determined by the agent order in the Resources list","the next available agent, based on the last agent selected and the agent order in the Resources list ","the agent assigned to the selected Resource Group and is thus qualified to be selected"]
许多发达国家的人口增长迅速，其主要原因是（） ["由于增强了营养，出生率急剧上升。","在延长人的寿命方面取得很大成就。","婴儿死亡人数和疾病死亡人数显著减少。","第二次世界大战以后，大量移民涌入这些国家。","早婚，导致出生率显著上升。"]
Authentication for user data traffic is important, but so is authentication for IP voice traffic. The Cisco 830 802.1 feature provides an easier method for allowing IP voice traffic through the VPN, because it（）. ["requires access lists to identify the voice traffic ","can allow traffic from a device without 802.1X authentication, by MAC address","can allow traffic from Cisco IP phones by listening to their CDP advertisements","allows all packets marked with a ToS of 5 to bypass authentication","allows all IP voice packets to bypass authentication via stateful inspectio"]
简述保险装置的种类及作用。
