2. 考研
  3. In the late 1800’s Ellen Richards, began work in the new field of "sanitary science" which was concerned with waste removal, wat

In the late 1800’s Ellen Richards, began work in the new field of "sanitary science" which was concerned with waste removal, wat

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问题 In the late 1800’s Ellen Richards, began work in the new field of "sanitary science" which was concerned with waste removal, water purification and .
选项 A、to ventilate adequately
B、adequate ventilation
C、adequate ventilate
D、ventilation adequately
答案B
解析 本题考查句子结构。分析句子可知，which引导定语从句，修饰“sanitary science(公共卫生学)”，其中and连接三个并列名词词组，故所填的词组应与waste removal和water purification的结构一致，故答案为[B]项。
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