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4 The outer surface of composite duct must be noncombustible materials, internal insulation material must be B1 level noncombustible or flame retardant, and harmless.

4.2.4 复合材料风管的履面材料必须为不燃材料，内部的绝热材料应为不燃或难燃B1级，且对人体无害的材料。

Equipment used in oxygen service must meet stringent cleaning requirements; any system must be constructed of materials that have high ignition temperatures and which are nonreactive with oxygen under the service conditions.

氧气设施中使用的设备必须满足严格的清洁要求；系统必须采用具有高点火温度且在使用条件下同氧不反应的材料建造。

Equipment used in oxygen service must meet stringent cleaning requirements; any system must be construct ed of materials that have high ignition temperatures and which are nonreactive with oxygen under the service conditions.

氧气设施中使用的设备必须满足严格的清洁要求；系统必须采用具有高点火温度且在使用条件下同氧不反应的材料建造。

Equipment used in oxygen service must meet stringent cleaning requirements; any system must be constructed of materials that have high ignition temperatures and whichare nonreactive with oxygen under the service conditions.

氧气设施中使用的设备必须满足严格的清洁要求；系统必须采用具有高点火温度且在使用条件下同氧不反应的材料建造。

Please note that if an agent is involved in the aforementioned formalities, the power of attorney should also be notarized and verified in a similar procedures for the notarial deed. The power of attorney must specify the name, domicile, the scope of authorization of the agent and must be signed or chopped by the inheritor.

怀念那一间间有点陈旧的教室，那里曾经让我感到知识的气息；怀念现在尘土飞扬充满砂石的老操场，那里曾经让我在通宵后踢球踢到趴下；怀念毛主席像前的大草坪，那里曾经让我和她安静地仰望星空；怀念我住过的宿舍，那里曾经是我另外一个家。

Precision must be an integer between 1 and 34.1213 Syntax error: numeric use statement must be first in block.

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Nursling science education goal can not adapt to the need of the era of knowledge economy and information and we must study it deeply and make an relative adjustment. Teachers play an important role in the course of executing nursling science education at present. There is big distance among teachers in scientific fiber, science knowledge, scientific ability, lacking high fiber teachers has confined the development of nursling scientific education in Zhengzhou, even in the whole country, it must be changed through effective system and means.

本文从幼儿科学教育的定义作为切入点，分析时代发展对幼儿科学教育的要求，借鉴国外和我国台湾地区幼儿科学教育的先进思想和经验，反思了传统常识教育的局限，对幼儿科学教育目标进行了新的确认，即把培养幼儿关心爱护环境的积极情感和对自然、科学的正确态度作为主要目标，同时培养幼儿学习科学的方法和技能，帮助幼儿获取丰富的科学知识和经验。

To seek the dynamic interest balance between the security obligator and consumers and to realize justice and efficiency,we must take the principle of benefit balance as starting point to define the concept of the obligation of security,the nature,settle the content of law and the judge standard and set up the legal obligation of the security obligation. So we must think about the present situation of legislation and judicial practice in China and learn from other countries' successful experience.

由于安全保障义务人相对于权利人处于"优势"地位，其有足够的能力防止损害的发生，因此必须以利益均衡原则为出发点来界定安全保障义务的概念、认定其法律性质、划定其内容和判定标准、规定违反安全保障义务的法律责任，以实现权利人与义务人两者利益关系的动态平衡，达到公平和效率的价值目标。

If two parties want to sign a contract C over a communication network, they must "simultaneously" exchange their commitments to C Since simultaneous exchange is usually impossible in practice, protocols are needed to approximate simultaneity by exchange partial commitments in a piece by piece manner The party of secondly sending commitments may have a slight advantage; a "fair" protocol must keep this advantage within acceptable limits The protocol for signing a contract is improved based on the research result of secure multiparty computation In this protocol, the parties obliviously transfer the signed bit and the committed bit; the other parties can prove the validity of this bit based on the confirming sub protocol, but he can't gain more information about the whole signature by accumulating the signed bit or the committed bit After the parties exchange the whole signed information, they declare the commitment about the signature respectively, and gain the whole signature of the other party At this moment, the party doesn't care about the advance quit of the other party, because he has gained the whole signed information Finally, it is proved that this protocol is quit fairness

作者中文名：曲亚东；侯紫峰；韦卫摘要：在网络环境中解决合同签订问题需要保证信息交换的同时性，以前提出的协议都会给第2个发送者部分计算特权，利用不经意传输协议则可以解决这个问题。在协议执行过程中，参与者将合同的签名位以及他对签名位的承诺不经意传输给对方，对方可以利用验证子协议证明该位的有效性，但是他却不能通过位交换次数的增加获取更多的完整签名的信息；在完成签名位的交换之后，参与者分别宣布承诺，并得到对方对合同的完整签名；在宣布承诺时，协议参与者已经获得全部的签名内容，要么是签名位，要么是对方对该位的承诺，因此参与者并不需要担心对方提前终止协议。在文章的最后利用多方安全计算的结论证明了该协议满足终止公平性。

If two parties want to sign a contract C over a communication network, they must "simultaneously" exchange their commitments to C Since simultaneous exchange is usually impossible in practice, protocols are needed to approximate simultaneity by exchange partial commitments in a piece by piece manner The party of secondly sending commitments may have a slight advantage; a "fair" protocol must keep this advantage within acceptable limits The protocol for signing a contract is improved based on the research result of secure multiparty computation In this protocol, the parties obliviously transfer the signed bit and the committed bit; the other parties can prove the validity of this bit based on the confirming sub protocol, but he cant gain more information about the whole signature by accumulating the signed bit or the committed bit After the parties exchange the whole signed information, they declare the commitment about the signature respectively, and gain the whole signature of the other party At this moment, the party doesnt care about the advance quit of the other party, because he has gained the whole signed information Finally, it is proved that this protocol is quit fairness

在网络环境中解决合同签订问题需要保证信息交换的同时性，以前提出的协议都会给第 2个发送者部分计算特权，利用不经意传输协议则可以解决这个问题在协议执行过程中，参与者将合同的签名位以及他对签名位的承诺不经意传输给对方，对方可以利用验证子协议证明该位的有效性，但是他却不能通过位交换次数的增加获取更多的完整签名的信息；在完成签名位的交换之后，参与者分别宣布承诺，并得到对方对合同的完整签名；在宣布承诺时，协议参与者已经获得全部的签名内容，要么是签名位，要么是对方对该位的承诺，因此参与者并不需要担心对方提前终止协议在文章的最后利用多方安全计算的结论证明了该协议满足终止公平性1 引言两个参与者A和B想要通过网络协商签订合同C 为了保证公平性，参与者必须同时交换自己对合同的签名，然而在实际的网络环境中，想要完全同时地交换对合同的签名是不可能的，他们必须将签名分成若干块依次地执行，以保证大致的同时性但是这种方法依然存在着问题

Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势，并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。