He has ________ on his farm.
A. 20 head of cattles
B. 20 heads of cattles
C. 20 heads of cattle
D. 20 head of cattle
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下列选项中,()也称主次图,是直方图与折线图的结合,直方图用来表示属于某项目的各分类的频次,而折线点则表示各分类的累积相对频次。
A. 趋势图
B. 柱状图
C. 排列图
D. 控制图
If she feels like it, she can work in a hospital as a part-time nurse.
Although she was very poor, the woman set aside part of her income for the education of her child.