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【单选题】
在铁碳合金凝固过程中,从体中析出的渗碳体为( )。
A.
一次渗碳体
B.
二次渗碳体
C.
三次渗碳体
D.
四次渗碳体
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【简答题】1 There are many arguments for and against television. The poor quality of its program is often criticized and TV commercials are also boring. So television is undoubtedly 1.__________ a great comf...
【简答题】1 There are many arguments for and against television. The poor quality of its program is often criticized and TV commercials are also boring. So television is undoubtedly 1.__________ a great comf...
【简答题】1 There are many arguments for and against television. The poor quality of its program is often criticized and TV commercials are also boring. So television is undoubtedly 1.__________ a great comf...
【单选题】Which class-of-service component allows you to define the bandwidth allocated to different traffic types?()
A.
classification
B.
rewrite marking
C.
scheduling
D.
queuing
【单选题】Which class-of-service component allows you to define the bandwidth allocated to different traffic types?()
A.
classificatoin
B.
rewrite marking
C.
scheduling
D.
queueing
【单选题】Which of the following types of ethnic cultural expression is discussed in the passage?
A.
The retelling of traditional narratives
B.
The wearing of traditional clothing
C.
The playing of traditional music
D.
The celebration of traditional holidays
E.
The preparation of traditional cuisine
【简答题】符号 (H 2 O,1,298K)表达的具体含义是______。
【多选题】Which types define the methods getAttribute() and setAttribute()?
A.
HttpSession
B.
ServletRequest
C.
ServletResponse
D.
ServletContext
E.
ServletConfig
F.
SessionConfig
【简答题】已知CH4(g)+2O2(g)=CO2(g)+2H2O(g)反应的热力学数据:△rHΘm(298K)=-802.3 kJmol-1,△fHΘm(CO2,298K)=-393.5KJmol-1,△fHΘm(H2O,g,298K)=-241.82KJmol-1,求△fHΘm(CH4,g,298K)=?
【简答题】298K,标准态下,1g Fe在氧气中完全燃烧生成Fe 2 O 3 (s),放热7.36kJ。则298K时,Fe 2 O 3 (s)的标准摩尔生成焓等于______。M(Fe)=56g·mol -1 。
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