A:19,21;B:19,23;C:21,23;D:27,30;
[单选题]:1,3,3,5,7,9,13,15,( ),( )。A.19,21 B.19,23 C.21,23 D.27,30
[单选题]1,3,3,5,7,9,13,15(),()A . A:19,21B . B:19,23C . C:21,23D . D:27,30
[单选题]3, 5, 7, 9, 13, 15, 21, 23, ( )。A.29B.31C.33D.35
[单选题]:1, 3, 3, 5, 7, 9, 13, 15, ( ), ( )。A.19,21B.19,23C.2l,23D.27,30
[单选题]4,6,5,7,7,9,11,13,19,21,( )A. 27,29B. 32,33C. 35,37D.41,43
[单选题]4,6,5,7,7,9,11,13,19,21,( ),( )A.27,29B.32,33C.35,37D.41,43
[单选题]:(1/19)3×42×(21/5)2×19/24×(38/7)2的值是( )。A.2B.1C.24/25D.17/5
[单选题](1/19)3×42×(21/5)2×19/24×(38/7)2的值是( )。A.2B.1C.24/25D.17/5
[单选题]5, 3, 7, 9, 15, 23, ( )。A.27B.31C.35D.37
[单选题]1/3,4/7 ,7/11 ,2/3 ,13/19 ,( )A. 16/21B. 16/23C. 18/21D. 17/21