单选题The author implies that topsoil is lacking in nutrients for which of the following reasons?I. The repeated planting of the same crops every yearII. The high acid content of slug trailsIII. The lingering after-effects of certain pesticidesA I onlyB II o
题目
单选题
The author implies that topsoil is lacking in nutrients for which of the following reasons?I. The repeated planting of the same crops every yearII. The high acid content of slug trailsIII. The lingering after-effects of certain pesticides
A
I only
B
II only
C
I and III only
D
I, II, and Ill
E
None of the above
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参考答案和解析
正确答案：
D
解析：
文中第四段提到I中的内容。同一段中还提到III中的陈述。文中没有涉及II中陈述，故选C项。
文中第四段提到I中的内容。同一段中还提到III中的陈述。文中没有涉及II中陈述，故选C项。