手术后每天检查体温、心脏机能和术部变化。若一切正常可于（）天后拆线。
A.1-3
B.3-5
C.7-10
参考答案：C
—Tom should have been warned not to cheat in the exam.
—_______, but he wouldn’t listen to me.
A．So he had
B．So has he
C．So was he
D．So he was
有关小儿牙齿，以下哪种说法最准确、最全面（）
A.乳牙是未钙化的牙齿，因而不如恒牙坚硬耐磨
B.一般若10个月未出牙，应高度警惕先天无牙胚
C.共有20个乳牙，乳牙萌出时间一般为4～12个月龄
D.一般于4～10个月龄时萌出
E.乳牙萌出顺序无个体差异
