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【单选题】
当 时, 能由 线性表示A.
-4
B.
4
C.
8
D.
-8
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A.
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B.
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C.
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D.
idea screening
E.
concept development
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A.
Testing high-strength materials for building submarines.
B.
Designing a thick metal sphere for submarine crews.
C.
Charting the Mariana Trench in the western Pacific Ocean.
D.
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A.
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B.
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C.
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D.
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E.
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