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问题 单项选择题 A1型题

医疗卫生机构和有关单位发现有突发公共卫生事件情形的，向所在地卫生行政主管部门报告的时限要求是在发现（）

A.6小时后

B.4小时后

C.3小时后

D.2小时后

E.2小时内

答案

参考答案：E

单项选择题

An analog signal’s characteristic quantity representing data may (66) . at any instant, any value within a continuous (67) . For example, an analog signal may follow continuously the values of another physical quantity representing data.

A discrete signal is composed of (68) elements in time, each element having one or more characteristic quantities which can represent data. Examples of characteristic quantities are amplitude, waveform, (69) , and position in time. A digital signal is a special case of discrete signals, in which data are represented by a (70) number of well-defined discrete values that one of its characteristic quantities may take in time.

（66）处填（）。

A．acquire

B．collect

C．assume

D．fetch
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多项选择题

托收承付结算款项的划回方法，分为（）。

A.邮寄

B.电邮

C.电报

D.电汇
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