Scientists are trying to find more ______ ways to make full use of solar energy.

We should make every effort to use energy _ (efficient).题型说明根据括号里所给词的适当形式填空，每空2分

[单选题]A generator is a machine to( )mechanical energy into electric energy.A.make

[单选题]In trying to get across a message, an EFL learner may use __________ strate

[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

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