畸形中央尖多见于
A．上颌第一前磨牙
B．上颌第二前磨牙
C．上颌侧切牙
D．下颌第一前磨牙
E．下颌第二前磨牙
参考答案：E
What ______ us most was that the news that the names for the pandas had been chosen was really ______.
A．excited, excited
B．exciting, excited
C．excited, exciting
D．exciting, exciting
教育史上最早提出教学的教育性原则的教育家是()。
A.裴斯泰洛奇
B.赫尔巴特
C.夸美纽斯
D.柏拉图
