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【单选题】
将四环素粗品溶于pH2的水中,用氨水调pH4.5—4.6,28-30°C保温,即有四环素沉淀结晶析出 。此沉淀方法称为
A.
有机溶剂结晶法
B.
等电点法
C.
透析结晶法
D.
盐析结晶法
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参考答案：
举一反三
【单选题】当洪水即将来临时,应对洪水灾害的正确方法是
A.
到屋顶、大树或附近小山丘上暂避
B.
及时报告,统一组织抢险救灾
C.
有序的进行人员和财产转移
D.
有序的将人员和财产向高出转移
【单选题】Rock Industries has four divisions.In the quest to develop a more achievable budget for the coming year, the chief executive officer has elected to develop the company’s budget by using a decentralize...
A.
be negligible.没有什么可值得一提的。
B.
require development of a production budget that is forwarded to the Budget Department.编制生产 预算递交预算部门
C.
require development of a production budget after receiving the division’s projected sales forecast. 在收到本分部的销售预测后，编制生产预算
D.
require development of a production budget based on the prior year’s manufacturing activity.根据 上一年度的制造活动编制生产预算
相关题目：
【单选题】当洪水即将来临时,应对洪水灾害的正确方法是
A.
到屋顶、大树或附近小山丘上暂避
B.
及时报告,统一组织抢险救灾
C.
有序的进行人员和财产转移
D.
有序的将人员和财产向高出转移
【单选题】Rock Industries has four divisions.In the quest to develop a more achievable budget for the coming year, the chief executive officer has elected to develop the company’s budget by using a decentralize...
A.
be negligible.没有什么可值得一提的。
B.
require development of a production budget that is forwarded to the Budget Department.编制生产 预算递交预算部门
C.
require development of a production budget after receiving the division’s projected sales forecast. 在收到本分部的销售预测后，编制生产预算
D.
require development of a production budget based on the prior year’s manufacturing activity.根据 上一年度的制造活动编制生产预算
参考解析：
题目纠错 0
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