题目内容
( ) 4.——How can spaceships fly into space without astronauts?
—They mainly use ______ controls.
A. sunlight B. moonlight
C. electricity D. electronic
4. D electronic controls意为"电子控制"。
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题目内容
( ) 4.——How can spaceships fly into space without astronauts?
—They mainly use ______ controls.
A. sunlight B. moonlight
C. electricity D. electronic
4. D electronic controls意为"电子控制"。