2. 外语
  3. Earth is mentioned by the author as a necessity for hydroponics. The original hydroponics gardens merely consisted of plants fl

Earth is mentioned by the author as a necessity for hydroponics. The original hydroponics gardens merely consisted of plants fl

admin2012-09-10  99
问题 Earth is mentioned by the author as a necessity for hydroponics.
The original hydroponics gardens merely consisted of plants floating in inert substances.
选项 A、Right
B、Wrong
C、Not mentioned
答案B
解析 见文中第三段第一句，可知在初期plants并非浮在“inert substances”中，而是在water中。
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