A. sharks in the southeast Australia B. precautions against sharks C. how a man became rich due to his bravery D. the victims of sharks 参考答案:C 答案解析:[听力原文]18-20 Every year sharks kill or injure a number of unfortunate bathers in the warmer pa
第22题: [单项选择]关于子宫的解剖,下述哪项正确 A. 子宫体与子宫颈的比例在婴儿期为2:1 B. 成年妇女子宫颈管长约3cm C. 子宫颈主要由平滑肌构成 D. 子宫肌层肌束的排列顺序为:外层为环形,内层纵形,中层多各方交织 E. 子宫峡部的黏膜无周期变化 参考答案:B 答案解析:[解题思路] A选项子宫体与子宫颈的比例在成年期为2:1,在婴儿期为1:2;C选项子宫峡部的黏膜也受卵巢激素的影响,呈周期性变化;D选项肌束的排列为外层纵形,内层环形,中层交织;E选项子宫颈主要由结缔