The purpose in writing this text is ______. The biggest advantage of this new system is that ______.

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问题 The purpose in writing this text is ______.
The biggest advantage of this new system is that ______.

选项 A、it reduce the cost of recycling
B、it saves time and space
C、it saves money for people in high rises
D、it makes better use of the existing recovery equipment

答案A

解析 文中最后一段说明了Shantzis与其他设备的不同点:Shantzis believes his system could help recycled become more cost effective.这也是其最大优点。
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