比鲁尼对各种金属的比重进行了相当精确的测定。()

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风景石是存在于哪里的岩石?A.其他B.地幔C.地核D.地壳

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Although____Spanish, he attended the course.

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—I came to your office yesterday morning, but nobody was in.—Oh, we__________ a

—I came to your office yesterday morning, but nobody was in.—Oh, we__________ a meeting in the meetin

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