题目内容

盐水氨化的目的说法不正确的是()

A. 制备氨盐水
B. 使氨盐水达到碳酸化要求的浓度
C. 起到最后除去钙镁离子的作用
D. 盐水的氨化和碳酸化的工艺顺序可以互换

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氨气与氯化钠的实际摩尔配比为()

A. 1:1
B. 1:1.1
C. 1.1:1
D. 以上都不对

混凝土灌注桩灌注充盈系数不得:()

A. 小于1
B. 大于1
C. 小于0.9
D. 大于0.9

Abeneficiarypresentscomplyingdocumentstoaconfirmingbankunderadocumentarycreditavailablebydeferredpayment.Thebeneficiaryrequeststhattheconfirmingbankpurchasethedocumentsandprepayagainstitsundertaking.InaccordancewithUCP600,whichofthefollowingmaybethecorrectcourse(s)ofactionfortheconfirmingbank?()

A. Obtaintheissuingbank’sagreementpriortopayingthebeneficiary
B. Refusethebeneficiary’srequestwhileundertakingtopayatmaturity
C. Prepaythedeferredpaymentundertaking
D. Obtainanagreementforrecoursetothebeneficiary

蒸氨流程中,塔顶的压力控制在()

A. 表压0.02MPa
B. 真空度800Kpa
C. 真空度800pa
D. 微负压,以不影响盐水下流为限

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