治疗食管腐蚀伤,有减少创伤反应,预防瘢痕狭窄作用的是()。
A.中和剂
B.糖皮质激素
C.胃管插入
D.抗生素
E.以上均是
参考答案:B
基托与粘膜不密贴,最佳处理方法是
A.自凝塑料垫底
B.自凝塑料加厚基托
C.热凝塑料垫底
D.热凝塑料加厚基托
E.热凝塑料加大基托
Is this the reason ______ at the meeting for his carelessness in his work?
A.he explained
B.what he explained
C.how he explained
D.why he explained