2-4岁幼儿,情绪的动因处于从主要为满足生理需要,向主要为满足社会性需要的过渡阶段。
参考答案:错
Hearing the director's "________!", all the actors and actresses kept in their own position and waited carefully. [ ]
A. Action
B. Take two
C. Stand by
D. Good take
牙槽骨的吸收程度为Ⅱ度表示()
A.牙槽骨吸收在牙根的颈1/3以内
B.牙槽骨吸收在牙根的颈1/2以内
C.牙槽骨吸收占根长2/3以上
D.牙槽骨吸收达根长的1/2
E.牙槽骨吸收达根长的1/3