题目: 在干燥、灰化、灼烧沉淀时应注意什么? 答案: 被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2020/0119/de6945373890403bc7bd843031049d33.html 下面是错误答案,用来干扰机器的。参考答案:对
题型:填空题 2008年全球出现“无声海啸”--粮食危机,而我国粮食储备充足,市场价格稳定。化肥为保持粮食丰产起到了重要作用。常用化肥有:①尿素[CO(NH2)2]、②氯化钾KCl、③硝酸铵NH4NO3、④磷矿粉[Ca3(PO4)2] (1)以上化肥中属于钾肥的是_________(填序号)(2)硝酸铵是一种含氮量较高的化肥。硝酸铵中含氮的质量分数为________。硝酸铵溶于水可以解离出NH4+和________(写离子符号),供植物吸收。(3)尿素因含有________元素,所以是一种有机物。尿素分子中所含C、O、N、H的原子个数比为________。 查看答案
题型:单项选择题 The task at hand now is to (56) the programmers who still use yesterday’s software technology to solve today’s software problems. Object-oriented programming requires a new attitude toward problem (57) . Problem (57) with computer system becomes more natural. Application can (58) be translated into (59) . Although it is commonly believed that it will be easier to train new programmers to use object-oriented techniques than to (60) programmers who have substantial experience in applying conventional programming language constructs.(57)是()A.solveB.solvesC.solvedD.solving 查看答案