水样中硝酸盐氮测定的常用方法有酚二磺酸分光光度法、镉柱还原法、戴式合金法和紫外分光光度法。
1、正确正确
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Wehavereceivednews_thatthewoolmarketonyoursideisshowingsignsofrecovery.
Anorderisarequesttosupplyaspecifiedquantityofgoods,whichmayresultfrom________or_________withsubsequentquotations.
企业的长期待摊费用如果不能使以后会计期间受益的，应将其摊余价值全部转入当期损益。()
Ifyoucanmakeusafirmofferata______price,wewillplaceanorderwithyourcorporation.
Onlythen______theimportanceofmyhealth.
