1.Which kind of terms needs to be defined for the different understandings among people?
Abstract concepts
B. Physical objects
C. Technical terms
2.Merely stating the word to be defined in a definition is __________ .
A. forbidden
B. acceptable
C. unavoidable
杨氏弹性模量由材料的性质决定。
A. 对
B. 错
在应用拉伸法测量杨氏弾性模量实验中,采用光杠杆法测量微小变化量。
A. 对
B. 错