【简答题】工业上以硫铁矿为原料制硫酸所产生的尾气除了含有N 2 、O 2 外,还含有SO 2 ,微量的SO 3 和酸雾.为了保护环境,同时提高硫酸工业的综合经济效益,应尽可能将尾气中的SO 2 转化为有用的副产品.请按要求回答下列问题: (1)工业制备硫酸时硫铁矿燃烧的设备是______,反应的化学方程式为______. (2)将尾气通入氨水中,能发生多个反应,写出其中可能发生的任意一个氧化还原反应的化学方...
【简答题】(1)(4分)高炉炼铁过程中发生的主要反应为:1/3Fe 2 O 3 (s)+CO(g) 2/3Fe (s)+CO 2 (g),已知该反应在不同温度下的平衡常数如下。则: ①该反应的△H_____0(填“>”、“②在一个容积为10L的密闭容器中,1000℃时加入Fe、Fe 2 O 3 、CO、CO 2 各1.0 mol,反应经过l0 min后达到平衡。求CO的平衡转化率= ________。 (2...
【单选题】Statistics that are of particular interest to macroeconomists
A.
are largely ignored by the media.
B.
are widely reported by the media.
C.
include the equilibrium prices of individual goods and services.
D.
tell us about a particular household, firm, or market.
【多选题】《钢铁产业发展政策》规定了现有企业要通过技术改造努力达标的准入条件,以下符合相关要求的条件是( )。
D.
高炉有效容积1 000m3及以上;沿海深水港地区建设钢铁项目,高炉有效容积要大于3000m3
E.
转炉公称容量大于120t及以上;沿海深水港地区建设钢铁项目,转炉公称容量大于200t钢生产规模800万t及以上
【简答题】如何在你的显示器上观测图像的像素?1 台笔记本的屏幕分辨率为 1366×768,长宽
比例是 4:3、16:9 还是 16:10?屏幕分辨率(以像素每英寸(DPI)为单位)是多少?选择一
个高分辨率图像、一个低分辨率图像,比较分别观察到像素时图像的放大倍数的差异。
【简答题】已知转炉造渣碱度要求为3.0,铁水中含Si为1.2%,石灰有效为70%,计算吨钢石灰加入量是多少?
【单选题】Seamark buys $300,000 of Eider’s 8% five-year bonds payable at par value on September 1. Interest payments are made semiannually on March 1 and September 1. The journal entry to accrue interest earned...
A.
Debit Interest Receivable $8,000, credit Interest Revenue $8,000.
B.
Debit Interest Receivable $12,000, credit Interest Revenue $12,000.
C.
Debit Cash $8,000, credit Interest Revenue $8,000.
D.
Debit Cash $12,000, credit Interest Revenue $12,000.
E.
Debit Interest Revenue $8,000, credit Interest Receivable $8,000.
【简答题】He is __________ in the ___________ story. (interest )
【单选题】运行结果:()。
A.
Array ( [0] => this [1] => is [2] => an )
B.
Array ( [0] => this [1] => is [3] => array )
C.
Array ( [0] => this [2] => an [3] => array )
D.
Array ( [1] => is [2] => an [3] => array )
【简答题】用所给单词的适当形式填空 1. He showed ______ (interest)in English last year. And he is______ ( interest) in English now. 2. The students feel very _______ ( excite) at the______ ( excite) leavers' party. 3. A ...