搜题请搜索小程序“爱下问搜题”
问题 选择题

用CO还原赤铁矿样品（主要成分是Fe2O3，还有不参加反应的杂质）18克，使原混合物反应中放出的全部CO2跟足量的澄清石灰水反应，生成白色沉淀27克，则样品中Fe2O3的百分率为　 [ ]

A．78.3%

B．89.2%

C．70%

D．80%

答案

答案：D

单项选择题

You are working as a project manager for a major US-based public company．This morning you received alarming news that the major strategic project you are responsible for will not be able to provide financial benefits to the organization as expected．This drawback will significantly influence future profits of the entire corporation．What should you do right now ？（）

A．You should not overact and check at least three options before making any decision

B．You must immediately inform the corporate management to ensure real time issuers disclosure

C．You should investigate detailed information on the problem before escalating it to corporate managemen

D．You should find a quick solution for the problem and implement this immediatel
查看答案
单项选择题

鱼对水说：“你看不见我的眼泪，因为我在水中。”水对鱼说：“我能感觉到你的眼泪，因为你在我心中。”从哲学角度看，下列选项对这段话理解最恰当的是（）

①世界上的一切事物都与周围其他事物有着这样或那样的联系

②人的认识是不断发展的

③认识受主客观因素的影响

④认识没有是非检验标准

A.①②

B.①③

C.②④

D.③④
查看答案