1.Lucy carried out an experiment to compare the energy contents of liquid fuels.He
heated some water in a beaker by burning one kind of fuel each time.
我想知這個係咩意思?
2.Lucy carried out an experiment to compare the energy contents of liquid fuels.He
heated some water in a beaker by burning one kind of fuel each time.
Which of the following need NOT be kept the same in the experiment?
A.Temperature of water at the end of the experiment.
B.Amount of fuel burnt
C.Amount of water in the beaker.
D.Air temperature.
點解揀A???我想知原因