上颌尖牙来源于哪个突起
A．上颌突
B．下颌突
C．球状突
D．鼻突
E．侧鼻突
参考答案：A
She _______ this book for nearly three weeks.
A．has borrowed
B．has lent
C．has bought
D．has kept
损害的发生不是教育法律救济的前提
