第14题: [单项选择]The fact that cotton prices were falling is mentioned by the author to show that ______. A. cotton shipments should have been adjusted B. poorer soil produced poorer quality crops C. the planters were having hard times D. there were reasons why young people move westward 参考答案:C 答案解析:[解析] 推理判断题。本题答案在文章的结尾。作者在第二段倒数第三句提到棉花价格下降,继而提到种植者的成本相应增加,而收益减少,而在最后又总结说南卡罗莱纳州正处于困难时期,也就是南卡罗莱纳州的种植者们处
第25题: [单项选择]年轻女性系统性红斑狼疮患者出现心肌梗死,有关的自身抗体是() A. 抗核抗体 B. 抗dsDNA抗体 C. 抗SSA抗体 D. 抗心磷脂抗体 E. 抗U1-RNP抗体 参考答案:D 答案解析:年轻女性系统性红斑狼疮患者出现心肌梗死,考虑狼疮继发心脏病变,抗心磷脂抗体阳性提示存在抗磷脂综合征,导致心梗发生。