口腔黏膜病中最常见的疾病是()。
A.复发性口腔溃疡
B.唇炎
C.牙龈炎
D.舌炎
E.口腔疱疹
参考答案:A
2010年上半年发生的下列自然灾害中,不属于气象灾害的是[ ]
A、西南地区特大旱灾
B、我国北方大范围遭遇沙尘暴
C、湖南遭遇强降雨
D、青海玉树发生7.1级大地震
— How are you doing all these years, Jim?
— Nothing new. Everything is going on ____it was years ago. [ ]
A. as
B. while
C. when
D. since