血钙降低见于
A．急性出血坏死性胰腺炎
B．甲状旁腺功能亢进
C．低蛋白血症
D．多发性骨髓瘤
E．婴儿手足搐搦征
参考答案：A,C,E
In relation to the formation of a contract in the context of the UN Convention for the International Sale of Goods, explain:
(b) the circumstances under which an offer may be terminated. (5 marks)
卫生间在设计中常划分为（）
A．动态空间
B．固定空间
C．活动空间
D．开敞空间
