Techniques______the energy of the sun are being developed.A.harnessingB.aimingC.assistingD

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Techniques______the energy of the sun are being developed.

A.harnessing

B.aiming

C.assisting

D.attempting

请帮忙给出正确答案和分析,谢谢!

热搜:关于氨基酸代谢错误的论述是_________。