应用计量调整型抽样方案对连续生产的产品批进行验收时，当产品检验费用较高、检验耗费时间

如图，绝缘的光滑水平面上，紧靠左边的竖直墙面固定有一水平弹簧枪，某时刻枪发射出一颗质量为m、速度为υ₀，不带电的子弹P，子弹水平射入停在同一水平面上B点处的小球Q而未穿出．小球Q带正电，电量为q、质量为3m，接着两者一起向前运动，从C点进入一正交的匀强电场和匀强磁场区域，电场方向竖直向上，磁场方向垂直纸面向里．小球进入电磁场后在竖直平面内做匀速圆周运动，最后小球飞出电磁场刚好落到水平面上的B点，CC′是磁场和电场的共同边界线，已知

.

BC

=L，不计空气阻力，重力加速度为g，求：

（1）匀强磁场的磁感应强度的大小．

（2）小球从B点出发再落回到B点所经历的时间为多少？

Why must we pay taxes The answer is that the government needs money for many things, for example, to pay its soldiers, sailors and airmen, to build roads, bridges, offices, schools, etc, and to buy goods from abroad ; and only the people of the country can supply the money. One of the most important taxes is income-tax which a person pays according to the amount of his income, whether he is a merchant, a doctor, a lawyer, a shopkeeper, a miner or anything else. This is called a "direct" tax, because it is paid in money directly to the government. Another tax is paid on goods such as watches, jewelry, new clothes, tobacco, wine, etc, when they are brought into a country. Such a tax is paid as part of the price of these goods if they are late sold in shops. We call it "indirect" tax, because it is paid indirectly through the shopkeepers. People usually complain about having to pay taxes, but they forget that the money is spent on things that they and their families need. We need policemen to catch thieves, to see that men obey the laws, to direct traffic, etc, and they must be paid what they earn; children need education, and there must be schools and teachers; we want our streets to be kept clean, and the wages of men who do this kind of work have to be paid. Above all, the country must always be ready to defend itself against attacking enemies, and we can’t have an army without paying for it. Besides, if a country wants to develop, there are many other things to do... Taxes, therefore, cannot be avoided. We buy our food and clothes and pay for our amusements; but, there are several things that the State finds the money for, and that is necessary for us if our society is to continue. We have no real reason to complain, therefore, when we are asked to supply money to be spent for the good of ourselves and for our fellow-citizens.

Title: (46)
Governments need (47) for many things to do	a. (48) its soldiers, sailors and airmen b. (49) roads, bridges, offices, schools, etc c. (50) goods from abroad
Kinds of taxes and tax-payers	a. (51) , which is paid by people whose income is over a certain amountb. (52) , which is paid through the shopkeepers
The function of tax	Guarantee the (53) and the (54) of a country
(55)	Taxes can not be avoided

某房屋建筑工程项目，建设单位与施工单位按照《建设工程施工合同(示范)文本》签订了施工承包合同。施工合同中规定：
(1)设备由建设单位采购，施工单位安装；
(2)建设单位原因导致的施工单位人员窝工，按18元/工日补偿，建设单位原因导致的施工单位设备闲置，按下表中所列标准补偿；
设备闲置补偿标准表

机械名称	台班单价(元／台班)	补偿标准
大型起重机	1060	台班单价的60%
自卸汽车(5t)	318	台班单价的40%
自卸汽车(8t)	458	台班单价的50%

(3)施工过程中发生的设计变更，其价款按建标[2003]206号文件的规定以工料单价法计价程序计价(以直接费为计算基础)，间接费费率为10%，利润率为5%，税率为3.41%。
该工程在施工过程中发生以下事件：
事件1：施工单位在土方工程填筑时，发现取土区的土壤含水量过大，必须经过晾晒后才能填筑，增加费用30000元，工期延误10天。
事件2：基坑开挖深度为3m，施工组织设计中考虑的放坡系数为0.3(已经工程师批准)。施工单位为避免坑壁塌方，开挖时加大了放坡系数，使土方开挖量增加，导致费用超支10000元，工期延误3天。
事件3：施工单位在主体钢结构吊装安装阶段发现钢筋混凝土结构上缺少相应的预埋件，经查实是由于土建施工图纸遗漏该预埋件的错误所致。返工处理后，增加费用20000元，工期延误 8天。
事件4：建设单位采购的设备没有按计划时间到场，施工受到影响，施工单位一台大型起重机、两台自卸汽车(载重5t、8t各一台)闲置5天，工人窝工86工日，工期延误5天。
事件5：某分项工程由于建设单位提出工程使用功能的调整，须进行设计变更。设计变更后，经确认直接工程费增加18000元，措施费增加2000元。
上述事件发生后，施工单位及时向建设单位造价工程师提出索赔要求。
问题：
(1)分析以上各事件中造价工程师是否应该批准施工单位的索赔要求为什么
(2)对于工程施工中发生的工程变更，造价工程师对变更部分的合同价款应根据什么原则确定
(3)造价工程师应批准的索赔金额是多少工程延期是多少天

双母线接线的变电站发生某一段110kV母线交流回路断线时，下列哪一种处理错误？（）

A、迅速将可以转供的负荷转出，并断开交流断线开关

B、迅速将交流回路断线的空载线路开关断开

C、确认旁路开关交流回路完好后，采用旁路开关旁代某一受影响保护的开关，并将受影响的开关断开

D、迅速进行倒母线操作，将交流断线的馈线倒至完好的另外一段母线运行

旅行社所做广告应当符合国家有关法律、法规的规定，不得进行虚假的广告宣传。旅游广告应当具备以下内容（）。

A.旅行社名称

B.旅行社营业执照号码

C.被代理旅行社名称

D.旅行社经营许可证号码