The promising idea mentioned in the first paragraph_______. It can be inferred from the passage that the new products of Panaso

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问题 The promising idea mentioned in the first paragraph_______.
It can be inferred from the passage that the new products of Panasonic, Netgear, Marantz_______.

选项 A、can directly move data by home electrical wiring
B、are adapters or a similar system to transfer data
C、provide the present Wi-Fi criteria for wireless networking
D、were produced for home electrical lines last month

答案B

解析 根据题干关键词Panasonic,Netgear和Marantz定位到第六、七、八段。文章第六段第一句“松下开始卖它的HD-PLC以太网适配器…”,第七段第一句“Netgear下个月也将卖它的一种类似的系统…”,第八段“Marantz说它的ZR6001SP接收器…”以及后面解释的工作原理和的两种相似,因此答案为B。A错在“directly”,因为这三种产品都需要适配器或类似的系统;这三种产品采用而不是提供Wi-Fi标准,因此排除C;Netgear的产品还没有生产出来,下个月才开始要卖,因此排除D。
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