轻型口疮的症状特点是（）
A.7～10天可愈
B.疼痛不明显
C.伴体温升高
D.唾液减少
E.愈合留瘢痕
参考答案：A
—Hello!May I speak to Tina, please?
— Sorry, I'm afraid you have the wrong __________. [ ]
A. name
B. way
C. number
D. telephone
2.6m2=______m2______dm2
1.8时=______分．
