When
some fruits emit (),
it causes other fruits to ripen.
A: ammonia
gas
B: oxygen
gas
C: ethylene
gas
D: nitrogen
gas
some fruits emit (),
it causes other fruits to ripen.
A: ammonia
gas
B: oxygen
gas
C: ethylene
gas
D: nitrogen
gas
举一反三
- 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
- _________ cancer[br][/br](1.0) A: commerce B: gas C: live D: tentative
- The crime __________ many officials.[br][/br](1.0) A: e concerned with B: gas station C: take a gamble D: in a good mood
- 1. The gas with maximum percentage in the atmosphere is .(Nitrogen / Oxygen)
- In<br/>the previous question, by what factor doesthe<br/>pressure of the gas changes?() A: a<br/>factor of 9, B: a<br/>factor of 3, C: a<br/>factor of √3, D: a<br/>factor of 1, E: a<br/>factor of 1/3