【单选题】【消耗次数：1】
The ____ problem of bring a spaceship back from the moon has been solved.
①
technical
②
technological
③
technique
④
technology
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【单选题】
The _____problem of bringing a spaceship back from the moon has been solved.
①
technical
②
technological
③
technique
④
technology
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①
utilized
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businesses employed
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We solved the problem
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①
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①
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①
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