At the very beginning of building the bridge,is the first word to do.( ) A.creating the caissons B.building the suspension chains C.preparing the riverbed D.building the piers
正确答案:C
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At the very beginning of building the bridge,is the first word to do.( ) A.creating the caissons B.building the suspension chains C.preparing the riverbed D.building the piers
正确答案:C