对阿片受体具有部分激动作用的药物是 （）
A.苯佐那酯
B.吗啡
C.喷他佐辛
D.喷托维林
E.纳洛酮
参考答案：C
腰椎前屈的限制因素是（）的弹性张力。
A.黄韧带
B.刺间韧带
C.刺上韧带
D.后纵韧带
E.骼腰韧带
根据汉语提示，用适当的单词填空。
1. Her father works in the ________ (医院). He is a doctor.
2. ________ (美国人) eat Turkey with their families on Thanksgiving.
3. Yesterday they ________ (参观) the Summer Palace.
4. My grandfather likes ________ (京剧) very much but I don't like it.
5. Look at the sun! You had better wear your ________ (太阳镜).
