1. (2023高二上·浙江期中) 有下列 Python 程序段：

dic = {"a": [9,12],"b": [8,16]}

dic["a"][1] = 15

dic["c"] = [12,13,11]

s="abc";sum=0

for i in s:

    sum += dic[i][1] print(sum)

该程序运行后输出的结果为（   ）

def avg(filename):

    df=pd.read_csv(filename)

    df1=df[df.columns[2:]] #    取类型及其后的所有列

    g=df1.groupby(   ①   ,as_index=False).mean()

    return    ②  

划线②处应填入的代码为（单选，填字母）。

A.df[df.类型=='AQI']     B.df1.AQI      C.g.AQI D.g[g.类型=='AQI']

import pandas as pd

import matplotlib.pyplot as plt

n=10 #城市个数

count=[0]*n

daymax=[0]*n

for i in range(1,31):

    day=str(i)

    if len(day)<2:

        day='0'+str(i)

    daydata='202204'+day+'.csv'

    dayaqi=avg(daydata)

    city=dayaqi.columns[1:n+1]

    for j in range(n):

        t=city[j]

        if dayaqi.at[0,t] <= 100:

        else:

            if count[j]>daymax[j]:

                daymax[j]=count[j]

            count[j]=0

    for k in range(n):

        if count[k]>daymax[k]:

print(daymax)

plt.figure(figsize=(12,4))

x=

y=daymax

plt.bar(x,y)

plt.show()

Private Sub Command1_ Click()

    Dim i As Integer， k As Integer

    Dim s As String， ch As String

    Dim max As Integer    '存储句子中最长单词的长度

    Dim ss As String    '存储句子中最长的单词

    s= Text1.Text

    i=1 ：k=0：max=0

    ch=“”

    Do While ch<>“.“ Or i <= Len(s)

        ch= Mid(s， i， 1)

        If ch <>“”And ch<>“.”Then

        Else

            k=0

        End If

        If  Then

            max= k

            ss=

        End If

        i=i+1

    Loop

    Text2.Text= Str( max)

    Text3.Text= ss

End Sub