Method To determine the number of students who have the HCV positiveresistance by checking their blood when they donate blood the first time in our college.
方法通过对本校首次参加无偿献血者的血液检验，确定抗- HC V阳性人数。
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Self-locking, self-sealing and reusable element, Permanently embedded in the threads of a fastener, Strong metal-to-metal contact and positiveresistance to vibration and loosening.
The structure and positiveresistance characteristics of humidity-sensitive resistor widely used in VTR have been discussed in this paper, and some application circuits have been briefly introduced.