第4题: [单项选择]催产素对子宫的作用,错误的是 A. 对非孕子宫的作用较弱 B. 对妊娠子宫的作用较弱 C. 雌激素能降低子宫对催产素的敏感性 D. 低剂量催产素可引起子宫节律性收缩 参考答案:C 答案解析:[考点] 催产素对子宫的作用特点 [解析] C项是错误的,雌激素和孕激素对催产素的影响恰恰相反:孕激素是降低子宫对催产素的敏感性,而雌激素则可促进催产素与其受体结合,增加子宫对催产素的敏感性
第24题: [单项选择]Passage TwoA. The relationship between man and his environment. B. The relationship between living things and their environment. C. The relationship between man and living things. D. The relationship between man’ s brain and other living things. 参考答案:A 答案解析:[解析] What does the passage mainly want to tell us [试题分析] 本题考查综合概括能力。 [详细解答] 可以听出讲