2. 外语
  3. Because short messaging service is a kind of data communication, second generation wireless cannot support it. 4G wireless comm

Because short messaging service is a kind of data communication, second generation wireless cannot support it. 4G wireless comm

admin2013-06-02  46
问题 Because short messaging service is a kind of data communication, second generation wireless cannot support it.
4G wireless communication can take the place of ______ to send images back to central command center.
选项
答案fiber
解析 由题干中的images和central command center定位到第三个小标题下首段前三句Beijing has already deployed cameras...and backhaul them wirelessly．此处应填入名词性成分。题干中提到4G无线通信可以替代某种东西传输照片；原文第二句指出This is generally done using fiber。故本题应填入fiber。
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