pH 缓冲液识别（可选择） 可选择 US (4.01, 7.00, 10.01) 或 NIST (4.00, 6.86, 9.1) pH 电极零点（offset)识别 于 pH 7.00 为 ±100 mV，于pH 6.86为108.3 mV / -91.7 mV pH 电极斜率(slope)识别 于pH 4.00, 4.01, 9.18 、 10.01为±30% ...

WELLINGTON, June 18 (Xinhua) -- New Zealand's current account deficit narrowed to 5.5 billion NZ dollars in the March quarter, as strong exports of fruit, dairy, and meat were partly offset by ...

LONDON, June 18 (Xinhua) -- Inflation in Britain remained unchanged in May, with the Consumer Prices Index (CPI) rising 3.4 percent year-on-year, the Office for National Statistics (ONS) reported ...