多项选择题 Lanuage has two levels of structures, which are _______________. A、syntactic level with sentences. B、primary level with words. C、secondary level with sounds. D、morphemic level with morphemes.

单项选择题 患者男，50岁。胰腺癌术后第6天出现腹痛。查体T39.5℃，腹肌紧张，有压痛及反跳痛，T管引流减少，腹腔引流管流出胆汁样液体。首先考虑的并发症是

判断题 聚焦超声治疗慢性宫颈炎的时机为月经干净后3-7天 （ ）