A . excessive heat
B . insufficient heat
C . effective cooling
D . high output
[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