Techniques______the energy of the sun are being developed.A、harnessingB、aiming

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问题 Techniques______the energy of the sun are being developed.

选项 A、harnessing
B、aiming
C、assisting
D、attempting

答案 A

解析 harness"治理，利用"；aim(at)"志在；旨在；瞄准，针对"；assist"帮助，援助"；attempt"试图，努力"。根据题意答案应为A，意为："人们正在开发治理太阳能的技术。"

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Techniques______theenergyofthesunarebeingdeveloped.A、harnessingB、aiming