在鸢尾花类别预测中，要先训练预测模型，再使用训练好的预测模型进行鸢尾花类别预测。下面哪些说法是正确的？（ ）[img=361x88]17e449445b30012.png[/img]
A: 训练模型时，需要用到字段label、sepal_length、sepal_width、petal_length、petal_width
B: 预测模型时，需要用到字段label、sepal_length、sepal_width、petal_length、petal_width
C: 训练模型时，需要用到字段sepal_length、sepal_width、petal_length、petal_width
D: 预测模型时，需要用到字段sepal_length、sepal_width、petal_length、petal_width
A: 训练模型时，需要用到字段label、sepal_length、sepal_width、petal_length、petal_width
B: 预测模型时，需要用到字段label、sepal_length、sepal_width、petal_length、petal_width
C: 训练模型时，需要用到字段sepal_length、sepal_width、petal_length、petal_width
D: 预测模型时，需要用到字段sepal_length、sepal_width、petal_length、petal_width
举一反三
- 观察如下基于皮尔逊相关系数绘制的热力图，判断属性sepal width(cm)和sepal length(cm）之间的相关关系可能符合如下哪一个选项？
- 下列哪些是正确的声明变量的方式？ A: int length; int width; B: int length, width; C: int length; width; D: int length, int width;
- The length and width of a piste are ________respectively. ( )
- 下列程序的输出结果为 class Box{ int length,width,height; public void setInfo(int l,int w,int h){ length = l; width = w; height = h; } public int volumn(){ return length*width*height; } public int area(){ return (length*width + length*height + width*height) * 2; } public String toString(){ return "Length:" + length + " width:" + width + " height:" + height + " volumn: " + volumn() + " area:" + area(); }} public class BoxTest { public static void main(String[] args) { Box b = new Box(); b.setInfo(5,2,4); System.out.println(b.toString()); }}
- The swimming pool is 80 meters _____ and 40 meters _______. A: in long; in wide B: in length; in width C: long; in width D: in length; wide