From observers’ estimates of the brightness of the fireball, he ______ that the body in the space was between 40 feet and 260 fe

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问题 From observers’ estimates of the brightness of the fireball, he ______ that the body in the space was between 40 feet and 260 feet in diameter.

选项 A、deduced
B、reduced
C、induced
D、produced

答案A

解析 这里需要选“推断”。
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