柴油机的万有特性是根据各种转速下的()特性绘制的。
参考答案:负荷
An analyst constructs a histogram and frequency polygon of monthly returns for aggressive equity funds over a 20-year period. Which of the following statements about a histogram or a frequency polygon is FALSE()
A. Both a histogram and a frequency polygon provide a graphical display of data found in a frequency distribution on.
B. A frequency polygon is a bar chart of continuous data that have been grouped into a frequency distribution.
C. The height of each bar in a histogram represents the absolute frequency for each return interval.
我们都吃过黄豆芽,黄豆通过萌发长成幼苗的现象属于生命现象中的( )
A.遗传变异
B.新陈代谢
C.生殖现象
D.生长现象