疾病自然史就是( )

The full title of the U.K. is the United Kingdom of （）and （）

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二级预防针对疾病自然史的阶段是（）

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二级预防是针对疾病自然史的哪个阶段（）.

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public and private colleges and universities and community colleges offer（）.

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（）is used for calling and replying,and for transmitting acknowleding and relaying distress alerts.

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The way in which people address each other depends on their age, sex, social group and personal relationship. The English system of address forms frequently used includes first name, last name, title+last name, （）, and kin term.

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疾病的预防工作可以根据疾病自然史的不同阶段，相应地采取不同的措施，这就是疾病的（）

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Solid waste generation，and electricity and water consumption are costly and have their own set of environmental（）.

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Whose duty is it to examine and verify the vessel’s classification and technical state and condition?（）.

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