【简答题】Explain why addition of HNO 3 to concentrated H 2 SO 4 results in the formation of and ions. How could one test experimentally to confirm that such ions exist in H2SO4 solution?
【单选题】Which of the following promises constitutes sufficient consideration in the formation of a contract?
A.
To reimburse the cost of refurbishing a house where the promise in made after the refurbishing has been completed
B.
To lease a house at an annual rent significantly below current market rates
C.
To pay a witness an agreed monetary sum in exchange for attending court
D.
To pay a worker extra remuneration in exchange of continuing to perform their existing contractual duties
【单选题】根据案例背景,回答以下问题。 宏达公司负责某工程的施工任务,编制了施工成本计划。其中,主体混凝土工程量约3200m3,预算单价550元/m3,计划4个月内均衡完成。开工后,混凝土实际采购价格为560元/m3。施工至第二个月底,完成混凝土工程量1800m3。对此有: 针对成本偏差,需要进行纠偏,其首先要确定的是( )。
【简答题】14《寂静的春天》第1课时作业 1.打开学习通课程--语文--章节,阅读这篇课文的原文及扩展阅读内容,课文读三遍。 2.抄写词语:写在自己作业本上拍照上传学习通。本课的重要字词,每词加拼音抄写3遍。 3.本文可以分为几个部分?请分析说明。 4.打开学习通-语文-资料(或章节),打开本课的教案 及PPT,学习课文。
【单选题】Participating in the formation of the median sulcus of the forearm is ( )
【简答题】What's the significance of Puritanism in the formation of America?