急性龋临床表现的为()
A.儿童和青年人多见
B.龋坏病变组织色浅
C.龋损病变进展迅速
D.龋齿腐质质地湿软
E.患者多有全身疾病
参考答案:A, B, C, D
Yesterday Tom was late for school the heavy rain.
A.because
B.because of
C.as
D.including
数据的校验,通常有哪写方法?