第13题: [单项选择]能使血钙、磷浓度都降低的物质是 A. 甲状腺素 B. 甲状旁腺激素 C. 维生素D D. 降钙素 E. 生长激素 参考答案:D 答案解析:降钙素是甲状腺滤泡旁细胞分泌的多肽激素。其生理作用有：①抑制破骨细胞活动，减弱溶骨过程，增强成骨过程，使骨组织释放的钙磷减少，钙磷沉积增加；②抑制肾小管对钙、磷、钠、氯的重吸收，从而增加尿钙、尿磷排泄
第18题: [单项选择]What does the woman think A. She thinks the Japanese first got to know how to play football. B. She doesn’t think football came from China. C. She thinks the Europeans play football better. 参考答案:C 答案解析:[听力原文] M: Do you know that Chinese first played football hundreds of years ago F: But now the
