枸橼酸钠作为抗凝剂主要用于（ ）
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枸橼酸钠抗凝的机制是（）
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The full title of the U.K. is the United Kingdom of （）and （）
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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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关于草酸钠抗凝剂的叙述，正确的是（）
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关于草酸钠抗凝剂的叙述，正确的是（）
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临床血液学和血液检验(clinical hematology and hematologic examinations)
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