根据《地基基础规范》，指出下列情况中哪些不需验算沉降（）
A.5层住宅，场地填方高度为2m，持力层承载力fk=90kpa
B.6层住宅，场地无填方，持力层承载力fk=130kpa
C.在软弱地基上，建造两栋长高比均为3.5的5层相邻建筑，持力层承载力fk=110kpa，基础净距为2.5m
D.烟囱高度为35m，持力层承载力fk=90kpa
参考答案：A
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