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【判断题】
不同振型对于质量矩阵、刚度矩阵以及柔度矩阵均是正交的。A.
正确
B.
错误
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反馈参考答案：
举一反三
【单选题】The car is quite small, _ if you have children. [ ]
A.
special
B.
especial
C.
specially
D.
especially
【简答题】The car is quite ________ of petrol. A) economic B) economical C) saving D) sparing
【简答题】定期点检主要是对设备进行定期的 、 、 检查和检测。
【单选题】What does the man need to do for his term paper?
A.
Interpret the statistical data in a journal article.
B.
Summarize the information in several published studies.
C.
Discuss a current controversy in biological research.
D.
Design an experiment that uses game theory.
【单选题】This passage most probably appears in
A.
a textbook on dementia.
B.
a term paper on Alzheimer's disease.
C.
a scientific research paper on dementia.
D.
an ad for a book on dementia in a magazine.
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