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The video security systems ______.

题目
单选题
The video security systems ______.
A

play an important role in arresting terrorists before they take action

B

have cost the U.S. Department of Homeland Security more than $ 40 million so far

C

are mainly deployed near Washington

D

work better than they have been expected to

参考答案和解析
正确答案： B
解析：
录音首句便指出“目前为止，美国国土安全部（the U.S. Department of Homeland Security）已经拨给美国各州超过400万美元以对video security systems（视频安全系统）进行投资”，因此选项B为正确答案。
【录音原文】
So far, the U.S. Department of Homeland Security has given American states more than $40 million to invest in video security systems. But in March, the Washington metropolitan police department admitted that the dozens of cameras it has had in place since 9/11 have so far netted zero arrests. What the surveillance cameras can do is help investigators piece together the details of plots after they are attempted, gather forensic evidence and identify suspects—all of which deepens their understanding of how terrorist networks operate.
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相似问题和答案

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Regardless of their basic purposes ― B2C or B2B ― virtually all EC sites rest on the same (), communication protocols, Web standards and security systems.

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B、patent

C、network structure

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第2题：

Huawei launched its new Videoconferencing Endpoint systems to be collaborated with Videxio’s platform. for customers’ superior video communication experience.()

此题为判断题(对，错)。


参考答案：对

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A.solve

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C.reduce

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B.ViDeo3

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参考答案：A, D

第7题：

security systems(短语翻译)

此题为判断题(对，错)。


正确答案：安全系统

第8题：

all EC sites rest on the same().

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C、Web standards

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Because of the systems-level approach， Cisco security can defend against widespread attacks from hackers and viruses. What describes the Cisco network security strategy？（）

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