原子吸收分光光度法测定空气中Pb、Cr、Cd、Hg的分析线波长分别是
A:283.3nm,357.9nm,228.8nm,253.7nm B:283.3nm,253.7nm,228.8nm,357.9nm C:357.9nm,253.7nm,228.8nm,283.3nm D:228.8nm,283.3nm,253.7nm,357.9nm E:357.9nm,253.7nm,283.3nm,228.8nm
某序装配扭矩工艺要求为100-110Nm,经检测装配扭矩如下,不合格为()
A:102Nm B:116Nm C:124Nm D:135Nm
MPV骑马螺栓装配扭矩工艺要求为90-120Nm,经检测装配扭矩如下,不合格为()
A:91,102,106,112Nm B:98,116,105,127Nm C:113,104,,124,87Nm D:110,93,124,135Nm
已知:h=6.63×10-34Js,则波长为0.01nm的光子能量为()。
A:12.4eV B:124eV C:12.4×105eV D:0.124eV
原子吸收分光光度法测定空气中Pb、Cr、Cd、Hg的分析线波长分别是()
A:283.3nm,357.9nm,228.8nm,253.7nm B:283.3nm,253.7nm,228.8nm,357.9nm C:357.9nm,253.7nm,228.8nm,283.3nm D:228.8nm,283.3nm,253.7nm,357.9nm E:357.9nm,253.7nm,283.3nm,228.8nm
原子吸收分光光度法测定空气中Pb、Cr、Cd、Hg的分析线波长分别是()。
A:283.3nm357.9nm228.8nm253.7nm B:357.9nm253.7nm228.8nm283.3nm C:253.7nm357.9nm228.8nm283.3nm D:283.3nm253.7nm228.8nm357.9nm E:228.8nm283.3nm253.7nm357.9nm
已知: h=6.63310-34 Js,则波长为 0.01nm 的光子能量为 ( )
A:12.4 eV B:124 eV C:12.43105eV D:0.124 eV