The gas mask can ______ you against poison gas.
举一反三
- 中国大学MOOC: When you buy gas, you should tell the attendant whether you want unleaded, regular or premium gas.
- If you smell gas, ______ the gas, leave the house, and call the gas company.
- 中国大学MOOC:"When you buy gas, you can ask the attendant to “fill it up”.";
- A<br/>gas enclosed in a cylinder by means of a piston that can move without<br/>friction is warmed, and 1000 J of heat enters the gas. Assuming that<br/>the volume of the gas is constant, the change in the internal energy<br/>of the gas is [] A: 0 B: 1000<br/>J C: -1000<br/>J D: None<br/>of the above
- 中国大学MOOC: When you buy gas, you can either ask for a special amount, such as 10 dollars worth.