A:Warned; accompanied
B:Having warned; accompanying
C:Warning; accompanying
D:Having been warned; accompanying
下列有关经度的说法,正确的是( )
三年级一班捐赠给学校图书馆400本书后还剩273本,现在又买来125本,求原来三年级一班有____本书。
10-2 7 5+4 8-2