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【单选题】
中温回火的温度是（）。A.
150—250°C
B.
350—500°C
C.
500—650°C
D.
250—350°C
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【单选题】What level could the man reach after the course?
A.
The man could paint like a master.
B.
The man could paint by himself
C.
The man could paint under the teacher’s guidance.
【简答题】Why is a man “never a man”?
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【简答题】求函数E(x)=2exp(-α｜x｜)(α＞0)的傅里叶变换。
【多选题】ComposeSeries[Series[Exp[x],{x,0,10}],Series[Sin[x],{x,0,10}]]的运算结果与哪些语句一样
A.
Series[Exp[x],{x,0,10}]/.x->Series[Sin[x],{x,0,10}]
B.
Series[Exp[x],{x,0,10}]/.x->Sin[x]
C.
Series[Exp[Sin[x]],{x,0,10}]
D.
Series[Sin[Exp[x]],{x,0,10}]
【简答题】China’s Service Outsourcing Emerging Amidst Economic Recession By Ms. Li CHEN At http://www.businesswire.com/news/home/20090414005551/en/China’s-Service-Outsourcing-Emerging-Economic-Recession#.U9nUZr...
【简答题】写出下列单词的对应词。 1. man → ________________ 2. waiter → ________________ 3. businessman → ________________
【单选题】方程y"-3y'+2y=exp(x)cos2x的特解形式y=( )
A.
Aexp(x)cos2x
B.
xexp(x)(Acos2x+Bsin2x)
C.
exp(x)(Acos2x+Bsin2x)
D.
x²exp(x)(Acos2x+Bsin2x)
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