The energy stored in coal ______.

[问答题]It is well known that coal is an important source of energy.

[单选题]Coal mining industry in Britain provides( )of the energy consumed in the co

[单选题]Coal mining industry in Britain provides( )of the energy consumed in the co

[单选题]Coal mining industry in Britain provides( )of the energy consumed in the co

One very（ ）serious problem is energy. We get a great （ ） of energy we need from

The country is gradually lowering the proportion of coal in its energy system to

[单选题]While fossil fuels—coal, oil, gas—still generate roughly 85 percent of the

[单选题]While fossil fuels—coal, oil, gas—still generate roughly 85 percent of the

[单选题]While fossil fuels—coal, oil, gas—still generate roughly 85 percent of the

[单选题]While fossil fuels—coal, oil, gas—still generate roughly 85 percent of the