Scientists are now working ______ humanoids.Because they can help people a lot.

题目

Scientists are now working ______ humanoids.Because they can help people a lot.
Scientists are now working ______
humanoids.Because they can help people a lot.
A.on B.against C.into D.to

答案

" Scientists are now working _on_ humanoids.Because they can help people a lot."
科学家们现在正在致力于类人机器人.因为它们能够帮助人们许多.
work on 从事于.致力于.
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