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题7-1图给出了某高温合金的蠕变应变-时间(上)曲线和蠕变强度-时间(下)曲线。其中横坐标是h代表小时,纵坐标分别是蠕变应变和应力。某单位设计了一款战斗机发动机,方案阶段估算得到高压一级涡轮叶片叶身根部截面(温度T)的离心拉伸应力是80MPa(N/mm2),若不考虑弯曲应力,按照1.25倍安全系数进行设计,当分别选取0.2%蠕变极限、1%蠕变极限和蠕变断裂极限作为应力时,试分析和确定选取不同应力时叶片的蠕变应变和寿命(小时数)。 题7-1图 某高温合金在某温度T时的蠕变性能
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【单选题】A.He frequently gets things mixed up.B.He is always finding fault with Marsha.#
A.
He frequently gets things mixed up.
B.
He is always finding fault with Marsha.
C.
He Ires been trying hard to cover for Marsha.
D.
He often fails to follow through on his projects.
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【多选题】国际收支平衡表中的经常项目包括（）
A.
货物
B.
服务
C.
收益
D.
经常转移
E.
投资
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【单选题】He ________ fault with me. How can we get on well with each other?
A.
always finds   
B.
is always finding  
C.
has always found 
D.
will always find
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【单选题】He is a man who is always ______ fault with other people.
A.
putting
B.
seeking
C.
finding
D.
looking for
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【单选题】A.He enjoys finding fault with exams. B.He is sure of his success in the exam. ##
A.
He enjoys finding fault with exams.
B.
He is sure of his success in the exam.
C.
He doesnt know if he can do well in the exam.
D.
He used to get straight As in the exams he took.
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【单选题】下面( )对象不可以使用 PLINE 命令来绘制
A.
直线
B.
圆弧
C.
具有宽度的直线
D.
椭圆弧
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【简答题】A．He enjoys finding fault with exams. B．He is sure of his success in the exam. C．He doesn't know if he can do well in the exam. D．He used to get straight A's in the exams he took.
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【单选题】The farmer told the picnickers to leave because ______.
A.
he was unfriendly and fault-finding
B.
the meadow was of charge
C.
he worried they would destroy the enviornment
D.
the cows would come back after a while
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【单选题】作为基准物质的无水碳酸钠吸水后，标定HCl，则所标定的HCl浓度将
A.
偏高
B.
偏低
C.
产生随机误差
D.
没有影响
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【单选题】The farmer told the picnickers to leave because he was unfriendly and fault-finding.
A.
Y
B.
N
C.
NG
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相关题目：
【单选题】A.He frequently gets things mixed up.B.He is always finding fault with Marsha.#
A.
He frequently gets things mixed up.
B.
He is always finding fault with Marsha.
C.
He Ires been trying hard to cover for Marsha.
D.
He often fails to follow through on his projects.
查看完整题目与答案
【多选题】国际收支平衡表中的经常项目包括（）
A.
货物
B.
服务
C.
收益
D.
经常转移
E.
投资
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【单选题】He ________ fault with me. How can we get on well with each other?
A.
always finds   
B.
is always finding  
C.
has always found 
D.
will always find
查看完整题目与答案
【单选题】He is a man who is always ______ fault with other people.
A.
putting
B.
seeking
C.
finding
D.
looking for
查看完整题目与答案
【单选题】A.He enjoys finding fault with exams. B.He is sure of his success in the exam. ##
A.
He enjoys finding fault with exams.
B.
He is sure of his success in the exam.
C.
He doesnt know if he can do well in the exam.
D.
He used to get straight As in the exams he took.
查看完整题目与答案
【单选题】下面( )对象不可以使用 PLINE 命令来绘制
A.
直线
B.
圆弧
C.
具有宽度的直线
D.
椭圆弧
查看完整题目与答案
【简答题】A．He enjoys finding fault with exams. B．He is sure of his success in the exam. C．He doesn't know if he can do well in the exam. D．He used to get straight A's in the exams he took.
查看完整题目与答案
【单选题】The farmer told the picnickers to leave because ______.
A.
he was unfriendly and fault-finding
B.
the meadow was of charge
C.
he worried they would destroy the enviornment
D.
the cows would come back after a while
查看完整题目与答案
【单选题】作为基准物质的无水碳酸钠吸水后，标定HCl，则所标定的HCl浓度将
A.
偏高
B.
偏低
C.
产生随机误差
D.
没有影响
查看完整题目与答案
【单选题】The farmer told the picnickers to leave because he was unfriendly and fault-finding.
A.
Y
B.
N
C.
NG
查看完整题目与答案