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【简答题】
某材料的屈服极限σs=245MPa，若安全系数取ns=1.5，则该材料的应力为（）。
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反馈参考答案：
举一反三
【简答题】典型的高功率光纤激光加工系统一般包括五个基本单元：高功率光纤激光器系统、运动机构、控制系统、[填空（1）]、辅助系统。
【单选题】Question 40 Choose the appropriate letter A-D and write it in box 40 on your answer sheet. This text is taken from ______.
A.
a guide for new managers in a company.
B.
a textbook analysis of behaviour in organisations.
C.
a critical study of the importance of role signs in modern society.
D.
a newspaper article about role changes.
【简答题】Replace the relevant numerals in the following sentences with the correct word from the above box. They reduced the budget by $1m 40 years later. 1/2 of the people who attended in 1961 had never atten...
【简答题】典型的高功率光纤激光加工系统一般包括五个基本单元：高功率光纤激光器系统、运动机构、[填空（1）]、准直与聚焦系统、辅助系统。
【单选题】In this part of the Reading section, you will read 2 passages. You will have 40 minutes to read the passages and answer the questions. Most questions in the Reading section are worth 1 point, but the ...
A.
Not all Ceratopsian species had horns.
B.
Ceratopsians were vegetarians.
C.
The behavior. of similar species indicates other purposes.
D.
Other physical features were better adapted for huntin
【简答题】听录音，找出意义最接近的选项。 ( ) 1. A. I'm not Jill. ( ) 2. A. What's your mother? B. I'm Jill. B. Whose is the mother? C. Jill is my sister. C. Who is she? ( ) 3. A. There are three pencils and boxes....
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