but _______________ quantities of radiation from the sun are
[A] soon
[B] well
[C] much
[D] possible
they are inside 选择
are measured 选择
Convenience foods which are already 选择
Techniques______the energy of the sun are being developed.A．harnessingB．aimingC．assistingD
Techniques to 【employ 】the energy of the sun are
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