问题
填空题
测定氧化铁时应控制电炉温度和溶样时间,若温度过高,时间过长,则会产生部分(),包裹三价铁离子,致使测定结果偏()(高、低)
答案
参考答案:偏磷酸;低
测定氧化铁时应控制电炉温度和溶样时间,若温度过高,时间过长,则会产生部分(),包裹三价铁离子,致使测定结果偏()(高、低)
参考答案:偏磷酸;低
Questions 23-26 |
A.(A) You should be absent from work for 2 weeks before you hand in your resignation.
B.(B) You should submit your resignation at least 2 weeks before you leave.
C.(C) You should avoid having an exit interview with your immediate supervisor.
D.(D) You should first settle all your personnel items with the personnel manager.