元流单位重量液体从断面1流到断面2克服阻力消耗的能量，称为（）。 ["位置水头","压强水头","测压管水头","水头损失"]
对比金属结晶，固态相变均匀形核时包括哪几方面的能量变化？
You need to back up the existing data on a computer before you install a new application. You also need to ensure that you are able to recover individual user files that are replaced or deleted during the installation. What should you do?（） ["A","B","C","D"]
下列选项中，表述错误的是（）。 ["A.会计师事务所是否遵循了执业准则的要求作为判断其有无故意和过失的重要依据 ","B.注册会计师是否应承担法律责任，关键在于注册会计师是否有违约、过失或欺诈行为 ","C.判断注册会计师是否具有过失的关键在于注册会计师是否出具了不实报告 ","D.判断注册会计师是否具有过失的关键在于注册会计师是否按照执业准则的要求执业"]
冒顶事故的危害包括（）。 ["造成人员伤亡","砸坏设备","造成工作面停产等","造成煤炭资源浪费"]
知觉整合能力
