Which of the following conditions indicates the dilution of diesel engine lube oil by fuel oil?（） A: Water discharging from the water outlet of the lube oil purifier B: Fuel oil discharging from the water outlet of the lube oil purifier C: Lube oil discharging from the water outlet of the lube oil purifier D: A change in the lube oil viscosity

Which of the following is not a component of modern lubricant？ A: Lubricant base oil B: Lubricant additives C: Crude oil

The role and position of unconventional oil and gas resources in global oil and gas production are becoming more and more important. Which of the following are unconventional oil and gas resources? A: Tight rock oil and gas B: Mud shale oil and gas C: Coalbed methane D: Oil shale E: Oil sands F: Natural gas hydrate

which of the following eating habits should be avoided by people with phlegm and dampness () A: light B: less salt C: sweet D: low fat

Which substance is NOT considered to be Oil under the pollution prevention regulations? （） A: Petroleum and fuel oil B: Sludge C: Oil mixed with dredge spoil D: Oil refuse and oil mixed with waste