下列不是乳牙作用的是（） ["有利于恒牙的萌出","有利于发音","有利于心理健康","有利于咀嚼","有利于恒牙的发育"] 最易发生肺肉质变的疾病是（） ["肺脓肿","肺不张","大叶性肺炎","间质性肺炎","小叶性肺炎"] 链霉素中毒的眩晕特点为（）。 ["不伴耳鸣和听力减退","常先有口周及四肢发麻","多在发热后突然出现眩晕","都伴有眼球震颤","发作多短暂，很少超过两周"] 肝细胞脂肪变性脂滴的主要成分是（） ["类脂","脂蛋白","胆固醇","脂褐素","中性脂肪"] 常引起呕吐伴头痛及喷射性呕吐的疾病是（） ["急性胃炎","霍乱","胃潴留","颅内高压","幽门梗阻"] 锁骨下动脉的分支除外（）