下列哪种呕吐为反射性呕吐（） ["急性胆囊炎","抗癌药物","晕动病","癔症","脑出血"]
尿频实证的基本治疗原则是（） ["温补脾肾","清心泻火","清利湿热","通利小便","清肝利胆"]
妊娠36周末（） ["子宫底高度在脐耻之间","子宫底高度在脐上1横指","子宫底高度在脐上3横指","子宫底高度在脐与剑突之间","子宫底高度在剑突下2横指"]
酶的催化高效性是因为酶（） ["启动热力学不能发生的反应","能降低反应的活化能","能升高反应的活化能","可改变反应的平衡点","对作用物（底物）的选择性"]
皮肤最主要的吸收途径是（） ["角质层","毛囊","皮脂腺","汗管"]
简述气管插管术。
