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5. 一人造衛星繞著地球運行的軌道半徑為 R,速 率 為 v。若 此 人 造 衛星的軌道半徑變為 2R時,則其運行速率為 v的多少倍?(A) (B) (C) √2 (D) 2
問題詳情
5. 一人造衛星繞著地球運行的軌道半徑為 R,速 率 為 v。若 此 人 造 衛星的軌道半徑變為 2R時,則其運行速率為 v的多少倍?
(A)
(B)
(C) √2
(D) 2
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【題組】22. (A) its (B) their (C) it (D) theirs
【題組】23. (A) symbols (B) symbolization (C) symbolic (D) symbolizes
【題組】27. (A) crossed-culture (B) cross-cultural (C) cross-culture (D) crossed-cultural
【題組】26. (A) however (B) therefore (C) nevertheless (D) in spite
【題組】25. (A) using (B) use (C) used (D) in use
【題組】29. (A) where (B) whereas (C) when (D) whenever
【題組】30. (A) likewise (B) such as (C) such like (D) for
【題組】31. (A) mean (B) meaningful (C) meaningless (D) means