- 問題詳情:某幾何體的三視圖如下圖所示,則該幾何體的表面積為( )A.54 B.60 C.66 D.72【回答】B知識點:空間幾何體題型:選擇題...
- 13900
- 問題詳情:我國是個多民族的國家,共有少數民族( )A.54個 B.55個 C.56個 D.57個【回答】B知識點:民族題型:選擇題...
- 16571
- 問題詳情:等比數列前n項和為54,前2n項和為60,則前3n項和為( )A.54 B.64 C. D.【回答】解析:∵(S2n-Sn)2=Sn·(S3n-S2n),∴62=54(S3n-60).∴.*:D知識點:數列題型:選擇題...
- 11890
- 問題詳情:若∠A=35°16′,則其餘角的度數為A.54°44′ B.54°84′ C.55°44′ D.144°44′【回答】A知識點:角題型:選擇題...
- 30942
- 問題詳情:設,數列是以3為公比的等比數列,則的值為( )A.54 B.55 C.80 D.81【回答】C知識點:數列題型:選擇題...
- 21756
- 問題詳情:TomgoeseverywherewithCatherineGreen,a54-year-oldsecretary.Hemovesaroundherofficeatworkandgoesshoppingwithher."Mostpeopledon'tseemtomindTom,"saysCatherine,whothinksheiswonderful."He'smyfourthchild,"shesays.Shemaythinkofhimandtreathimthat...
- 21609