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回答(12)题A.turned B.worked C.led D.attempted

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回答(3)题A.changed B.described C.designed D.shaped

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When did NASA start working on a successor to the shuttle?

When did NASA start working on a successor to the shuttle?A.One year before the

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Which of the following statement is true of eye-trackers for

Which of the following statement is true of eye-trackers for consumer devices ?A

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What is the author's attitude toward Mir?

What is the author's attitude toward Mir?A.Indifferent. B.Ironic. C.Favorable. D

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