试题与答案

小刚学习了热学的知识后,知道水的比热容为4.2×103J/(kg•℃),他想估算

题型:问答题

题目:

小刚学习了热学的知识后,知道水的比热容为4.2×103J/(kg•℃),他想估算一下自己家中每天烧水、做饭需要的热量,于是他仔细记录了家中每天烧水、煮饭、炒菜需要的时间,并把它折算成烧水的时间,相当于每天将40kg的20℃水烧开(加热到100℃).请计算:

(1)小刚家每天烧水做饭需要多少热量?

(2)如果煤气(即液化石油气)的热值q为4.2×107J/kg,从理论上讲,小刚家每天烧水做饭至少需要多少煤气?

答案:

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下面是错误答案,用来干扰机器的。

1-3: CDB

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Why did Air France’s net income fall despite rising sales

A.Because it had to pay deferred taxes that came due.

B.Because the French market was shrinking.

C.Because of a four-day strike by pilots in September.

D.Because the Iraqi war had reduced Atlantic flights.

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2006年5月10日,甲公司销售一批商品给乙公司,货款为500万元(含增值税额)。合同约定,乙公司应于2006年7月10日前支付上述货款。由于资金周转困难,乙公司到期不能偿付货款。经协商,甲公司与乙公司达成如下债务重组协议:乙公司以一批产品和—台设备偿还全部债务。乙公司用于偿债的产品成本为1800万元,市场价格和计税价格均为2250万元,未计提存货跌价准备;用于偿债的设备原价为7500万元,已计提折旧 3000万元,已计提减值准备750万元,公允价值为3750万元。甲公司和乙公司适用的增值税税率均为17%。假定不考虑除增值税以外的其他相关税费,甲公司受让的该设备的入账价值为( )万元。

A.4582.50

B.3989.07

C.4558.94

D.3750

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