[多选题]已知同步发电机的同步电抗,则以下哪种情况在电枢反应下时去磁 ( )(A)纯电感性负载 (B)纯电容性负载 (C)三相对称电阻负载 (D)所有负载
[单选题]一个 C 类地址:192.168.5.0,进行子网规划,要求每个子网有10台主机,使用哪个子网掩码划分最合理()A、使用子网掩码255.255.255.192B、使用子网掩码255.255.255.224C、使用子网掩码255.255.255.240D、使用子网掩码255.255.255.252
[多选题]关于地震区砌体结构房屋的最大高宽比限值,下列哪项正确( )A、烈度为6度时,小于3.0B、烈度为7度时,小于2.5C、烈度为8度时,小于2.0D、烈度为9度时,小于1.5
[问答题]物料中的水分按能否用干燥操作分为哪些?按除去的难易程度可分为
[问答题]可用来鉴别苯酚溶液、乙酸乙酯、乙苯、庚烯的一组试剂是C
[单选题]下列关于我国行政法法源的表述正确的是( )A.行政法的法源即行政法的历史渊源B.行政法规是我国主要的行政法法源C.最高人民法院发布的行政判例也是我国行政法的法源D.法律解释不是我国行政法的法源
[填空题]什么是复合地基?请列举3种.
[单选题]语文课程目标的归宿是 A.正确把握语文教育的特点B.全面提高学生的语文素养C.积极倡导自主、合作、探究的学习方式D.促进学生的发展
[单选题]关于ARP表,以下描述中正确的是 ( ) . A、 提供常用目标地址的快捷方式来减少网络流量 B、 用于建立IP地址到MAC地址的映射 C、 用于在各个子网之间进行路由选择 D、 用于进行应用层信息的转换
[单选题]军队建设必须加强( )的领导.A.干部B.党C.群众D.人民
[填空题]物流活动中,配送的本质是什么
[判断题]变压器是依据电磁感应原理工作的.
[问答题]采用几何平均法计算平均发展速度的依据是( ).
[填空题]已经单活塞杆液压缸的活塞直径D为活塞杆直径d的两倍,差动连接的快进速度等于非差动连接前进速度的
[单选题]根据气体的对比态原理,对比温度Tr等于 A. Tc/TB.T/ToC.Tc/ToD.T/Tc
[判断题]大气的气温直减率( )小于作绝热上升运动的干空气的气温直减率(d)时,大气层结不稳定.
[问答题]变压器铁心处于饱和状态时,若励磁电流为正弦波,则磁通波形为________;若磁通波形为正弦波,则励磁电流为_________.
[单选题]More than seven hundred years ago, the Prince of Wales had a very big and brave dog called Gelert. One day the Prince wanted to go hunting with his men. He told his dog to stay at home and look after his baby son. The baby was in a wooden cradle, which was like a small bed.When the Prince came back from hunting, Gelert ran out to meet his master. He wagged his tail and jumped up to put his paws on the Prince’s chest. Then the Prince saw the blood on Gelert’s jaws and head. “What have you done?” the Prince said. He rushed into his house and looked for his baby son. The cradle was lying on its side on the floor. The clothes were torn and there was blood on them. “So you have killed my son?” the Prince said angrily.” You unfaithful dog!” He took out his sword and killed the dog.Just as Gelert was dying, he managed to bark. Then the Prince heard a baby call to the dog. The prince ran out of the house and saw his son lying on the ground unhurt. Near him was a dead wolf. Then the Prince knew that Gelert had defended the baby and killed the wolf. Then Prince ran back into the house but he was too late. Gelert was dead. The Prince was very sad indeed. Tears ran down his face when he realized he had killed his faithful friend. The Prince carried the body of his brave dog to the top of a mountain and buried him there. A.ter this, the Prince never smiled again. E.ery morning at dawn, he walked up the mountain and stood by the dog’s grave for a few minutes. If you go to Mount Snowdon inWales, people will show you where Gelert is buried. There is a sign by his grave. It reminds people of a brave and faithful dog.C.oose the right answer:Gelert was the dog of the Prince of ______________.得分/总分 A. Scotland B. Wales 2.00/2.00 C. Ireland D. England
[填空题]对放大电路来说,人们总是希望电路的输入电阻 越好,因为这可以减轻信号源的负荷.人们又希望放大电路的输出电阻 越好,因为这可以增强放大电路的整个负载能力.
[单选题]施工段,施工层在流水施工中所表达的参数为( ). A.工艺参数 B.时间参数 C.空间参数 D.一般参数
[判断题]按电气设备装设地点不同,配电装置可分为屋内配电装置和屋外配电装置.