简答题 试述魏氏法血沉测定质量控制中对病人、抗凝剂和血标本的要求。(10分)
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证券资产不能脱离实体资产而独立存在,因此,证券资产的价值取决于实体资产的现实经营活动所带来的现金流量。( )
A. 对
B. 错
The engineers spent the whole night (work) ______ on the new device.
The people injured in the accident (send) ______ to the nearest hospital for treatment last night.