Objective To research the value of ultrason ographic-guided fine needle biopsy of liver nodular lesion and low level elevation of serum alpha-fetoprotein(AFP) in early diagnosis of liver cancer.
目的探讨超声引导肝内结节细针活检及甲胎蛋白（AFP）轻度升高在肝癌早期诊断中的价值。
Inaccuracy in the process of measurement is analyzed. It is brought forward that temperature of rainfall is measured by the single-wire temperature sensor DS1820. So the velocity of the ultrason…
通过对测量过程中可能产生的误差进行了分析，提出了利用单线温度传感器DS1820测量雨水温度，实现对超声波传输速度的精确计算，达到准确测量雨量的设计要求（优于1%）。
Inaccuracy in the process of measurement is analyzed. It is brought forward that temperature of rainfall is measured by the single-wire temperature sensor DS1820. So the velocity of the ultrason…
通过对测量过程中可能产生的误差进行了分析，提出了利用单线温度传感器DS1820测量雨水温度，实现对超声波传输速度的精确计算，达到准确测量雨量的设计要求（优于1%）。
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