精密度
参考答案：精密度系指在规定的测试条件下，同一个均匀供试品，经多次取样测定所得结果之间的接近程度。
There are a number of things ______ him. He did nothing but ______ a lot of wine yesterday evening. [ ]
A. worrying; drink
B. worrying; drank
C. worried; to drink
D. worried; drink
采用______可完成等温加湿。
A．离心加湿器和超声波加湿器 B．干蒸汽加湿器和电加湿器C．电加湿器和表面蒸发式加湿器 D．喷水室和超声波加湿器
