题目内容

【题目】美国田纳西河流域是美国重要的棉花卢区，转基因棉比重超过95%。据此回答下列下列各题。

【1】美国田纳西河流域是美国重要的棉花产区，这体现了美国农业生产布局的主要特征是

A．生产集约化 B．地区专门化 C．生产差异化 D．生产优质化

【2】棉花产区中转基因棉比重高，得益于

A．自然条件的优越 B．交通运输的发展

C．生物技术的改进 D．劳动力效率的提高

【答案】

【1】B

【2】C

【解析】

试题分析：

【1】美国田纳西河流域是美国重要的棉花产区，这体现了美国农业生产布局的主要特征是地区专门化，充分利用自然条件，大规模种植优势作物，B对。生产集约化是指增大资金、技术、劳动等的投资力度，提高产量，A错。生产差异化应指不同的作物生产，C错。生产优质化注重产品的质量的提高，D错。

【2】棉花产区中转基因棉比重高，得益于生物技术的改进，C对。自然条件的优越 、交通运输的发展、劳动力效率的提高不是转基因技术得到发展的主要原因，A、B、D错。

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1．文章的起始句已给出。

2．词数：100左右（不包括已给的起始句）。

3．参考词汇：

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