把a2+ab分解因式的结果是 ______.
a2+ab=a(a+b),
故答案为:a(a+b).
— I'm sorry; I shouldn't have been so rude to you.
— You _____ something not very nice to me, but that's OK. [ ]
A. have said
B. had said
C. were saying
D. did say
可摘义齿口腔就位后,出现摆动现象,多发生在
A.第一磨牙缺失义齿B.侧切牙缺失义齿C.下颌双侧游离端义齿D.第二前磨牙缺失义齿E.上颌双侧游离端义齿