Heat energy is a source of power, but （） will cause damage to the engine.

[单选题]As a heat engine,（） energy is the source of power by which the diesel engine can be operated.A . electricB . heatC . mechanicalD . exhaust

[判断题] 英文POWER和POWER SOURCE的意思都是电源。（）A . 正确B . 错误

[单选题]Wind power is an ancient source of energy _________ we may return in the near future.A． on whichB． by whichC． to whichD． from which

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

[单选题]Solar energy is man's most important energy source. As the name implies, so

[单选题]Solar energy is man's most important energy source. As the name implies, so

[单选题]Solar energy is man's most important energy source. As the name implies, so

[单选题]Solar energy is man's most important energy source. As the name implies, so

[单选题]Solar energy is man's most important energy source. As the name implies, so

[单选题]Solar energy is man's most important energy source. As the name implies, so