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TCP是互联网中的 (12) 协议，使用 (13) 次握手协议建立连接。 （13）应选入（）。
A．1
B．2
C．3
D．4
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各变量值与算术平均数离差平方的和为（）。
\tA.0
\tB.1
\tC.最小
\tD.最大
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听力原文： An environmental group called the Food Commission is unhappy and disappointed because of the sale of bottled water from Japan. The water as is angrily argued in public, has traveled 10,000 'food miles' before it reaches Western customers. 'Transporting water halfway across the world is surely the extremely stupid use of fuel when there is plenty of water in the UK.' It is also worried that we are wasting our fuel by buying praums from Indonesia (7,000 food miles) and carrots from South Africa (5,900 food miles).Counting the number of miles traveled done by a product is a strange way of trying to tell the true situation of the environmental damage done by an industry. Most food is transported around the world on container ships that are extremely energy efficient. It should be noted that a ton of butter transported 25 miles in a truck transported hundreds of miles by sea. Besides, the idea of 'miles' ignores the amount of fuel used in the production. It is possible to cut down your food miles by buying tomatoes grown in Britain rather than those grown in Ghana; the difference is that the British one will have been raised in heated greenhouses and the Ghanaian ones in the open sun.What the idea of 'food miles' does provide, however, is the chance to cut out Third World Countries from First World food markers. The number of miles traveled by our food should, as I see it, be regarded as a sign of the success of the global trade system, not a sign of damage to the environment.(33)
A．BecauseE.B．BecauseF.C．BecauseG.D．BecauseH.
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Global Delta平台技术特点是（）。
A、纯正的欧洲血统
B、全运动型底盘，操控会更具韧性，方向盘路感更为清晰，弯道表现也更准确、流畅
C、车架一体化结构（BFI）
D、先进的全数码化智能Gm–lan总线结构
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依据《建筑工程文件归档整理归范》，施工单位将本单位的工程文件立卷后应向 移交。
A．建设单位B．设计单位C．监理单位D．当地城建档案馆
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【C4】A．toB．onC．forD．at
【C4】A．toB．onC．forD．at
A．toB．onC．forD．at
B．onC．forD．at
C．forD．at
D．at
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引起自然对流的原因是系统内部存在温度差，使各部分的流体的密度不同，而引起流体的上升或下降。
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以下人物没有出现在《世说新语》的是()
A.王戎B.陶渊明C.王子猷D.谢安
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幼儿的体温比成人略高，正常体温（腋表）为（）。
\tA.35-36℃
\tB.36-37.4℃
\tC.37-38.4℃
\tD.38-39.4℃
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代理过程中下列哪些情形下非经被代理人追认，对被代理人不发生法律效力。（）
A.无权代理的 B.越权代理的 C.变更代理权限的 D.转委托的 E.代理人扩大代理权限的
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