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问题 单项选择题

以下关于动物性食物中毒的说法，正确的是（）。

A、河豚鱼毒素是神经毒，中毒者有嘴舌发麻，头晕等神经系统症状，死亡率很高

B、河豚鱼毒素集中在卵巢、鱼肝、血液，肉和皮一般无毒

C、死了的海鱼、蟹、鲤鱼、鳝鱼、甲鱼因含组氨酸，吃了会发生食物中毒

D、吃死的蟹和甲鱼发生的食物中毒属于氰化物中毒

答案

参考答案：A

单项选择题

A metric is an operational definition that describes, in very specific terms, what something is and how the quality control process measures it. A measurement is an actual value. For example, it is not enough to say that meeting the planned schedule dates is a measure of management quality. The project management team must also indicate whether every activity must start on time or only finish on time and whether individual activities will be measured or only certain deliverables and if so, which ones. Some examples of quality metrics include defect density, failure rate, availability, reliability and test coverage. In this context, quality metrics should be used during ______ (select the best answer).

A．quality assurance

B．quality planning

C．quality control

D．quality assurance, quality control
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单项选择题

一套书，每隔五年出版一本，前5本出版的年代数的和是9795，这套书的第一本是哪一年出的( )

A．1930

B．1940

C．1949

D．1950
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