52. 分析下列句子One such proposal is for the 'Vertical Farm'. The concept is of multi-storey buildings in which food crops are grown in environmentally controlled conditions. Situated in the heart of urban centres, they would drastically reduce the amount of transportation required to bring food to consumers.(1) 这里的 they 指______ (2) situated 的逻辑主语是 ______
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51. 请指出下列代词指代Other scientists have written books to explain their fields to non-scientists, but have necessarily had to omit the mathematics, although it provides the foundation of their theories.这里的 it 指______
48. 完成下列句子分析Perhaps one of the most obvious examples of this idea is malaria-prone areas, which are usually tropical regions that foster a warm and damp environment in which the mosquitos that can give people this disease can grow.(1) 第一个which 修饰的先行词是 ______ (2) 第二个 in which 修饰的先行词是 ______ (3) in which 这个定语从句内 the mosquitos 对应的谓语 ______ (2个单词)
50. 分析下列句子Thus all readers will have the chance to participate in a mathematical experience, to appreciate the beauty of mathematics, and to become familiar with its logical, yet intuitive, style of thinking.(1)和 to appreciate并列的是 ______ (2个单词)(2)用阿拉伯数字填空 这里的 yet 表示 ______ (表示“但是”(转折)填 1;表示“甚至”(递进)填 2)
49. 指出下列句子中并列的成分As a result, super-viruses and other infections resistant to antibiotics are becoming more and more common.和 super-viruses 并列的是______