2. 外语
  3. Some plants are so ______ to pollution that they can only survive in a perfectly clean environment.

Some plants are so ______ to pollution that they can only survive in a perfectly clean environment.

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问题 Some plants are so ______ to pollution that they can only survive in a perfectly clean environment.
选项 A、infectious
B、sensitive
C、delicate
D、subject
答案B
解析 sensitive(to)a.(对……)敏感的；灵敏的。infectious a.(疾病)传染的，传染性的；有感染力的，易传播的。delicate a.微妙的，棘手的；(仪器)灵敏的，精密的。subject(to)a．易遭……的，受……支配的。
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