急喉痹相当于西医的（）；慢乳蛾相当于西医的（）
参考答案：急性咽炎；慢性扁桃体炎
It is known that China _____ the third world. [ ]
A. is belonging to
B. is belonged to
C. belonging to
D. belongs to
在碱溶液和氨溶液中，阀门里的铜部件被腐蚀吗？
