An oxygen indicator will detect (). concentrations of explosive gas。 an oxygen deficiency in a space。 the presence of harmful amounts of carbon monoxide。 All of the above。
Word2003中,以下哪一项功能可以帮助您查找不熟悉单词的近义替换词()。 同义词库。 自动编写摘要。 拼写和语法。 自动更正。
When fighting fires in spaces containing bottles of LPG (liquefied petroleum gas),you should (). attempt to isolate the fire from the LPG。 cool the bottles or remove them from the fire area。 see that the valves on all LPG bottles are closed。 place insulating material over the bottle。
要将当前窗口内容存入剪贴板中,应按()键。 A.Ctrl+C。 B.Ctrl+P。 C.Ctrl+V。 D.Alt+PrtScr。
What would you consult to determine the number of persons required on duty while loading a cargo of leaded gasoline on your tanker? () the Matitime Code of China。 Certificate of Inspection。 Oil Transfer Procedures Manual。 IOPP Certificate。
结构钢焊接时,焊条选择的原则是焊缝与母材在哪方面相同()