下述哪项不是前瞻性调查的特点（） -题库考试答案搜索网

下述哪项不是前瞻性调查的特点（）

单选题

2021-07-17 17:35

A、每次调查能同时研究几种疾病
B、多数情况下要计算人年发病（死亡）率
C、多用于罕见疾病
D、可直接计算发病率
E、因素可分为几个等级，以便计算剂量反应关系

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正确答案

C

试题解析

标签：流行病学相关专业知识卫生管理(医学高级)

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（）shall be liable for loss of and damage to the Vessel and／or goods arising or resulting from inaccuracies in stating the description，quantity，weight，measurement or contents.

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（）, or drum is used for hauling in or letting out the wires or ropes which will fasten the ship to the shore.

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The （） is used for hauling in or letting out the wires or ropes.

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When loading or discharging dry mud or cement，crew members should use goggles and（）.

Effects which are dutiable or subject to prohibitions or restrictions should be declared in （）.

（）are liable to be stoten, pilfered or may damaged due to improper handing or stowage.

Banks have no liability for any delay or loss caused by postal or telex failure.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

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