单选题
高一(1)班期末4个学科成绩平均分与年级平均分对照图表。用Python程序实现时,①②两行程序代码是？（）
import numpy as np
import matplotlib.pyplot as plt
import pandas as pd
df=pd.read_csv("高一(1)班成绩.csv",encoding="gbk")
x=np.array([1,2,3,4])
y=df["年级平均"]
y2=df["班级平均"]
①
②
plt.xticks(x+0.15,["Chinese","Math","English","Politlics"])
plt.show()
A
①plt.plot(x,y,linewidth="3")
②plt.plot(x,y2,linewidth=”3")
B
①plt.bar(x,y,width=0.3)
②plt.bar(x+0.3,y2,width=0.3)
C
①plt.plot(x,y)
②plt.plot(x,y2)
D
①plt.scatter(x,y)
②plt.scatter(x,y2)