血中卵泡刺激素含量高峰期是() ["整个月经周期","月经周期第21天","月经周期第一周","排卵前1~2天","月经中"]
简述拔牙后注意事项。
卵泡刺激素和黄体生成素的分泌部位是() ["黄体","卵巢","卵泡","垂体","下丘脑"]
女性的月经期,体内各种激素的情况为() ["雌激素水平更低,无孕激素","无雌激素,孕激素水平高","雌激素水平更高,孕激素水平亦高","雌激素水平更低,孕激素水平亦低","雌激素水平更低,孕激素水平高"]
原核细胞和真核细胞最明显的区别在于() ["有无核物质","有无细胞壁","有无核膜","有无细胞膜"]
诱发各种肿瘤的外界因素主要有()、()和()