正确答案: C

苍耳

题目：为田间杂草，是玉米螟的中间寄主，对土壤肥力消耗极大。

解析：C

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举一反三的答案和解析：

[单选题]-- Could you be so kind as to close the window?

WithpleasureB．Goahead

[单选题]22_______

got

[单选题]臭氧总量减少直接导致

平流层气温降低

[单选题]In Bargh’s experiment, the students were asked to ______.

evaluate someone’s personality