A.液體樣品應(yīng)充分?jǐn)噭颍旌暇鶆蚝蟀创硇匀?br/>B.液體樣品應(yīng)充分?jǐn)噭?,混合均勻后隨機取樣C.液體樣品應(yīng)充分?jǐn)噭?,混合均勻后分層取?br/>D.液體樣品應(yīng)充分?jǐn)噭?,混合均勻后按四分法取?/p>
A.扦樣器B.取樣鏟C.裝樣容器D.產(chǎn)品包裝袋
A.將密度瓶洗凈,烘干,稱量B.將密度瓶洗凈,并立即稱量C.將密度瓶用蒸餾水洗凈,再用試樣液沖洗三遍,并迅速稱量D.將密度瓶洗凈,反復(fù)烘干,稱量,直至恒重