【单选题】
A <{p}><{font _mstmutation="1" _msthash="20493" _msttexthash="26365027"}>本期一定等于上期<{/font}><{br/}><{/p}>
B <{p}><{font _mstmutation="1" _msthash="20489" _msttexthash="25735931"}>本期应当大于上期<{/font}><{br/}><{/p}>
C <{p}><{font _mstmutation="1" _msthash="20490" _msttexthash="25842323"}>本期应当小于上期<{/font}><{br/}><{/p}>
D <{p}><{font _mstmutation="1" _msthash="20491" _msttexthash="11908065"}>不能确定<{/font}><{br/}><{/p}>
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