皮皮学，免费搜题
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【单选题】
法测定血沉使用的抗凝剂是（）A.
3.8％枸橼酸纳
B.
109mmol／L枸橼酸纳
C.
肝素
D.
双草酸盐
E.
EDTA－K
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【多选题】在相关范围内,固定成本的特点包括:
A.
成本总额的不变性
B.
单位成本的不变性
C.
成本总额的正比例变动性
D.
单位成本的正比例变动性
E.
单位成本的反比例变动性
【单选题】What is a paragraph?
A.
A paragraph can be just one sentence long.
B.
The unity and coherence of ideas among sentences is what constitutes a paragraph.
C.
A paragraph is half a page long.
D.
A paragraph is a group of at least five sentences.
【简答题】朝向反射是（）的生理基础，（）是其最稳定的生理指标。
【单选题】What is a paragraph?
A.
A paragraph is a group of related sentences that deal with the same topic.
B.
A paragraph is a group of unrelated sentences that deal with the same topic.
C.
A paragraph is a group of unrelated sentences that deal with many topics.
D.
A paragraph is a group of related sentences that deal with many topics.
【简答题】为是么说朝向反射是不随意注意的生理基础？
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