2,3,7,19,136,( )
- A2580
- B2688
- C2684
- D2584
1/5,3/7,7/11,13/19,3/5,( )A11/47B21/37C31/67D31/47
1,2,7,19,138,()。A2146B2627C3092D3865
2,3,7,10,19,26,45,60,( )A99B105C113D127
4、1/3, 1/7, 7/9, 1/31, 19/45, (
1/3, 1/7, 7/9, 1/31, 19/45, ( )。A11/21B13/51C63/65D91/165
5、已知起航点经度λ1=136°12'.7W,到达点经度λ2=114°21'.3
已知起航点经度λ1=136°12'.7W,到达点经度λ2=114°21'.3E,则两地间的经差Dλ为()。AA.070°34'.0EBB.250°34'.0ECC.070°34'.0WDD.109°26'.0W
4,2,11/5,19/7,10/3,()。A37/11B4C21/13D5