Theexperimentshowedthatthesmallerfish.
A.foughtoverafeastB.wentondietwillingly
C.preferredsomeextr afoodD.challengedthebossfish
正确答案:B
Theexperimentshowedthatthesmallerfish.
A.foughtoverafeastB.wentondietwillingly
C.preferredsomeextr afoodD.challengedthebossfish
正确答案:B