Since William had been seriously ill for several months, his parents were worried about________ to return to school full-time.
D
暫無解析
與嗎啡相比，哌替啶可用于分娩止痛是由于它（）
維生素A的主要來源是（）
腫瘤發生血道轉移的依據是()。
腫瘤組織的繼發性病變不包括()。
胰島素過量易致（）
