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  3. The author used the example of a traveler(Para. 3) to show that That extra cost(Para. 5) probably refers to

The author used the example of a traveler(Para. 3) to show that That extra cost(Para. 5) probably refers to

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问题 The author used the example of a traveler(Para. 3) to show that
That extra cost(Para. 5) probably refers to
选项 A、software-licensing fees.
B、total cost of a software product.
C、payment for service contracts.
D、the charge for subscription.
答案A
解析 本题问第五段中"that extra cost"指的是…。第五段倒数第二句提到"Open-source companies have no vested interest in getting more licensing fees and don’t have to pad their service contracts with that extra cost"，既然有代词"that"，说明前面提到过这种"extra cost"，由此可以猜测它指的是本句中稍前的"licensing fees"。再联系文中的内容，开源软件本身是免费的(即没有licensing fees)，它收的是支持和服务费用。而微软则除了支持和服务费用，还有licensing fees，故这里extra cost显然正是指licensing fees．因此"软件许可证费用"正确。一个软件产品的所有费用、服务条款的费用：由分析可知extra cost既不是软件全部费用，也不是服务费用。订阅式的收费：微软的"软件保障"计划和开源软件公司都属于订阅式的收费，两者的区别并不在这里。而题干中的"that extra cost"正是指两者的区别，因此不能笼统地用"the charge for subscription"。
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