题目信息
According to some botanists, invasive plants are the second most serious threat, after habitat loss, to native species of plants and animals and to the maintenance of biologically diverse ecosystems.
A:threat, after habitat loss, to native species of plants and animals and to the maintenance of biologically diverse ecosystems
B:threat, after habitat loss, to native species of plants and animals and for maintaining biologically diverse ecosystems
C:threat, after losing their habitat, to native species of plants and animals and also to maintenance of biologically diverse ecosystems
D:threat to native species of plants and animals and for maintaining biologically diverse ecosystems, after habitat loss
E:threat to native species of plants and animals as well as to maintaining biologically diverse ecosystems, after losing their habitat
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已选答案：
正确答案：
A:threat, after habitat loss, to native species of plants and animals and to the maintenance of biologically diverse ecosystems
选项分析：
A 正确；
B to native species of plants和for maintaining不平行对称；
C and also to maintenance，and和also语义重复；
D to native species of plants和for maintaining不平行对称；
E “their”指代不明，语义模糊，排除；
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题目来源
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