【判断题】刚体的质量是刚体平动时惯性大小的度量,刚体对某轴的转动惯量则是刚体绕该轴转动时惯性大小的度量。
【单选题】耐酸青霉素的结构特点为酰胺侧链上的α-碳上含有()基团。
【判断题】刚体的质量是刚体平动时惯性大小的度量,刚体对某轴的转动惯量则是刚体绕该轴转动时惯性大小的度量。
【判断题】A research paper is a collection of different pieces of information about a topic.
【单选题】Which of the following statements about a research paper is true?
A.
It is an evaluation of relevant sources.
B.
It is a review of the literature in an area of study.
C.
It is a summary of collected sources.
D.
It analyzes a perspective or argues a point.
【判断题】刚体的质量是刚体平动时惯性大小的度量,刚体对某轴的转动惯量则是刚体绕该轴转动时惯性大小的度量。
【简答题】耐酸青霉素的结构特点为酰胺侧链上的α-碳上含有()基团。 A较大空间位阻 B推电子 C吸电子 D较小空间位阻
【判断题】A research paper is a synthesis of the existing studies in a field.