A.25
B.33
C.45
D.54
[单选题]1,9,7,27,13,( ),19,63A.25B.33C.45D.54
[单选题]1,9,7,27,13,( ),19,63。A.25B.33C.45D.54
[单选题]1, 9, 7, 27, 13, ( ), 19, 63A.25 B.33 C.45 D.54
[单选题]28,-7,27,21,25,-63,(),189,13A.22B.21C.24D.-26
[主观题]28,-7,27,21,25,-63,(),189,13A.22 B.21 C.24 D.-26
[单选题]1, 1, 5, 3, 9, 9, 13, 27, ( ), ( )。
[单选题]:[6/(1×7)]-[6/(7×13)]-[6/(13×19)]-[6/(19×25)]-……-[6/(97×103)]= ( )A.433/567B.532/653C.522/721D.436/673
[试题]1,3,3,5,7,9,13,15(),()A:19,21;B:19,23;C:21,23;D:27,30;
[主观题]1,1,5,3,9,9,13,27,(),()A.17,81B.16,54C.15,36D.14,42
[主观题]7 ×1 ÷(-9+19)