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【单选题】
10mol理想气体,由始态300K、1000kPa依次经历下列过程:(1)恒容加热到600K;(2)再恒压冷却到500K;(3)最后可逆绝热膨胀至400K。求整个过程的W、Q、△U及△H。已知:Y=Cpm/Cvm=1.4
A.
W= -12.47kJ      Q= 33.26 kJ    △U=20.79kJ      △H=29.10kJ
B.
W= -13.47kJ      Q= 34.26 kJ    △U=21.79kJ      △H=28.10kJ
C.
W= -10.47kJ      Q= 31.26 kJ    △U=20.79kJ      △H=29.10kJ
D.
W= -12.47kJ      Q= 33.26 kJ    △U=20.79kJ      △H=30.10kJ
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【单选题】我校李明同学全家月收入5000月左右,除生活消费外,尚有部分积蓄,他的爸爸和妈妈想把节余的钱用来投资。你认为他们在选择投资时应注意的问题有( )。1既要考虑投资的回报率,也要考虑投资的风险性2要考虑自身的经济状况,以及家庭消费计划3必须注意投资渠道多元化,以最大限度规避风险4应该集中全部资金投资收益最高的理财产品
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①③④
B.
②③④
C.
①②④
D.
①②③
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【简答题】We are all busy talking about and using the Internet, but how many of us know the history of the Internet? Many people are surprised when they find that the Internet was set up in the 1960s. At that t...
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【单选题】我校李明同学全家月收入5000月左右,除生活消费外,尚有部分积蓄,他的爸爸和妈妈想把节余的钱用来投资。你认为他们在选择投资时应注意的问题有(1)既要考虑投资的回报率,也要考虑投资的风险性(2)要考虑自身的经济状况,以及家庭消费计划(3)必须注意投资渠道多元化,以最大限度规避风险(4)应该集中全部资金投资收益最高的理财产品
A.
(1)(2)(4)
B.
(2)(3)(4)
C.
(1)(2)(4)
D.
(1)(2)(3)
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【简答题】We are all busy talking about and using the internet. But how many of us know the history of the internet? Many people are surprised when they find that the internet was set up in the 1960’. At that t...
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【简答题】We are all busy talking about and using the Internet. But how many of us know the history of the Internet? Many people are surprised when they find that the Internet was set up in the 1960s. At that t...
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【单选题】我校李明同学全家月收入5000月左右,除生活消费外,尚有部分积蓄,他的爸爸和妈妈想把节余的钱用来投资。你认为他们在选择投资时应注意的问题有( ) (1)既要考虑投资的回报率,也要考虑投资的风险性 (2)要考虑自身的经济状况,以及家庭消费计划 (3)必须注意投资渠道多元化,以最大限度规避风险 (4)应该集中全部资金投资收益最高的理财产品
A.
(1)(3)(4)
B.
(2)(3)(4)
C.
(1)(2)(4)
D.
(1)(2)(3)
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【判断题】最佳现金持有量是指在正常情况下，保证店铺生产经营是低限度需要的现金和银行存款数额。（ ）
A.
正确
B.
错误
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【单选题】We are all busy talking about and using the Internet, but how many of us know the history of the Internet? Many people are surprised when they find that the Internet was set up in the 1960s. At that t...
A.
For about 10 years.
B.
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C.
For about 40 years.
D.
For about 60 years.
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【简答题】We are all busy talking about and using the Internet. But how many of us know the history of the Internet? At first the Internet was only used by the goverment . 小题1: But in the early 1970’s , univers...
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【简答题】We are all busy talking about and using the Internet, but how many of us know the history of the Internet? Many people are surprised when they find that the Internet was set up in the 1960s. At that t...
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【单选题】我校李明同学全家月收入5000月左右,除生活消费外,尚有部分积蓄,他的爸爸和妈妈想把节余的钱用来投资。你认为他们在选择投资时应注意的问题有(1)既要考虑投资的回报率,也要考虑投资的风险性(2)要考虑自身的经济状况,以及家庭消费计划(3)必须注意投资渠道多元化,以最大限度规避风险(4)应该集中全部资金投资收益最高的理财产品
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【简答题】We are all busy talking about and using the internet. But how many of us know the history of the internet? Many people are surprised when they find that the internet was set up in the 1960’. At that t...
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【判断题】最佳现金持有量是指在正常情况下，保证店铺生产经营是低限度需要的现金和银行存款数额。（ ）
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B.
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【单选题】We are all busy talking about and using the Internet, but how many of us know the history of the Internet? Many people are surprised when they find that the Internet was set up in the 1960s. At that t...
A.
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B.
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C.
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D.
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