食管腐蚀伤在临床上可分为（）期、（）期和（）期。
参考答案：急性；缓解；狭窄
Their plan was ____. With it we had little trouble in finishing the work.
A．success
B．succeed
C．a success
D．a successful
采集肝功能的血标本应选用
A．液状石蜡抗凝管B．肝素抗凝管C．清洁干燥试管D．草酸钾抗凝管E．培养瓶
