单项选择题 Which of the following operations need NOT to be entered on the Oil Record Book Part I?（） (1) Disposal of oil residues (2) Internal transfer of fuel oil

单项选择题 Steering gears can be arranged with hydraulic control equipment known as a （）, or with electrical control equipment.

单项选择题 Should a person be overcome due to lack of oxygen and high concentration of refrigerant, treat with（）.