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问题 多选题
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日常生活中，下列哪些情况利用了电磁感应现象（   ）

A．录音机磁头将声音的电信号记录在磁带上

B．发电机通过旋转磁场中的线圈发电

C．银行柜员机通过信用卡上的磁条读取用户的信息

D．话筒通过振动磁场中的线圈将声信号转变为电信号

答案

BCD

单项选择题 B型题

每位患者第一次来院就诊时，不管住院、看急诊或门诊，就要发给一个唯一识别号，即病案号的编号方法是（）。

A.单一编号

B.系列编号

C.系列单一编号

D.集中编号

E.分散编号
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问答题

Ahmed is a cotton grower. He supplies his cotton to textile manufacturers. In June 2010 he entered into a contract with Shah Textile Mills Limited (‘STML’) for sale and supply of cotton. He received Rs. 100,000·00 as advance payment from STML. In August 2010 his cotton crop was destroyed by the severe floods in Pakistan.Required:In relation to the law of contract, advise Ahmed and STML on the impact of this event on their contract. (10 marks)
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