23,29, (),37,41。
A.35
B.33
C.31
D.32
4,6,5,7,7,9,11,13,19,21,(),() A.27,29 B.32,33 C.35,37 D.41,43
23 29 31 37 () A. 41 B. 40 C.43 D.45
-1,1,5,11,19,29,() A.30 B.31 C.32 D.41
33,32,34,31,35,30,36,29,()。 A.33B.37 C.39D.41
23,29,31,37,()。A.41B.40C.43 D.45
23 29 () 37 41。A.35 B.33 C.31 D.32