需求的构成要素包括( )。
A.消费者有购买意愿
B.替代品的价格上升
C.预期价格下降
D.消费者具有支付能力
E.互补商品价格上升
参考答案:A,E
以下有关关节活动范围练习的叙述中,哪一项是错误的
A.肩关节的关节活动范围练习方向可以以斜向螺旋动作组合为特征
B.若允许,可将夹板等固定拆除后进行关节活动范围练习
C.骨折固定后为防止今后的关节活动受限,应立即进行关节活动范围练习
D.心血管状态不稳定时,不宜进行主动关节活动范围练习
E.主动关节活动范围练习可防止血栓形成
What’s the attitude of many old senior officers for a minor fire?()
A.They would like to call out all hands out for it
B.They would rather handle themselves, then call out all hands
C.They prefer to put it out by themselves
D.They think it is difficulty to call out all hands for a minor fire