logoChat01.ai

讲解这七道题目

Erstellt am: 24. Juni 2025

Beantwortet mit O3 von Chat01

Frage

Screenshot_2025-06-24-13-49-46-06_e39d2c7de19156b0683cd93e8735f348.jpgScreenshot_2025-06-24-13-49-46-06_e39d2c7de19156b0683cd93e8735f348.jpg
Screenshot_2025-06-24-13-38-16-87_e39d2c7de19156b0683cd93e8735f348.jpgScreenshot_2025-06-24-13-38-16-87_e39d2c7de19156b0683cd93e8735f348.jpg
Screenshot_2025-06-24-13-37-47-94_e39d2c7de19156b0683cd93e8735f348.jpgScreenshot_2025-06-24-13-37-47-94_e39d2c7de19156b0683cd93e8735f348.jpg
Screenshot_2025-06-24-13-37-15-62_e39d2c7de19156b0683cd93e8735f348.jpgScreenshot_2025-06-24-13-37-15-62_e39d2c7de19156b0683cd93e8735f348.jpg
Screenshot_2025-06-24-13-30-28-02_e39d2c7de19156b0683cd93e8735f348.jpgScreenshot_2025-06-24-13-30-28-02_e39d2c7de19156b0683cd93e8735f348.jpg
IMG_20250624_124734.pngIMG_20250624_124734.png
Screenshot_2025-06-24-10-56-49-45_e39d2c7de19156b0683cd93e8735f348.jpgScreenshot_2025-06-24-10-56-49-45_e39d2c7de19156b0683cd93e8735f348.jpg

讲解这七道题目

Python

python
1*2**3//4%5

2

Python

python
a="Python 等级考试"
len(a)


11

Python

python
0.1*0.1==0.01

False

Python

python
from PIL import Image
import matplotlib.pyplot as plt

img = Image.open('/mnt/data/IMG_20250624_124734.png')
plt.imshow(img); plt.axis('off')

(-0.5, 4094.5, 1110.5, -0.5)

Python

python
img2 = Image.open('/mnt/data/Screenshot_2025-06-24-10-56-49-45_e39d2c7de19156b0683cd93e8735f348.jpg')
plt.imshow(img2); plt.axis('off')

(-0.5, 709.5, 447.5, -0.5)

Python

python
img3 = Image.open('/mnt/data/Screenshot_2025-06-24-13-49-46-06_e39d2c7de19156b0683cd93e8735f348.jpg')
plt.imshow(img3); plt.axis('off')

(-0.5, 567.5, 420.5, -0.5)

Python

python
img4 = Image.open('/mnt/data/Screenshot_2025-06-24-13-38-16-87_e39d2c7de19156b0683cd93e8735f348.jpg')
plt.imshow(img4); plt.axis('off')

(-0.5, 1474.5, 1071.5, -0.5)

Python

python
img5 = Image.open('/mnt/data/Screenshot_2025-06-24-13-37-47-94_e39d2c7de19156b0683cd93e8735f348.jpg')
plt.imshow(img5); plt.axis('off')

(-0.5, 1088.5, 663.5, -0.5)

Python

python
img6 = Image.open('/mnt/data/Screenshot_2025-06-24-13-37-15-62_e39d2c7de19156b0683cd93e8735f348.jpg')
plt.imshow(img6); plt.axis('off')

(-0.5, 966.5, 470.5, -0.5)

Python

python
img7 = Image.open('/mnt/data/Screenshot_2025-06-24-13-30-28-02_e39d2c7de19156b0683cd93e8735f348.jpg')
plt.imshow(img7); plt.axis('off')

(-0.5, 1181.5, 986.5, -0.5)

Gedanke

Evaluating the bullet list

The user may have intended to ask about the bullet points 10 through 16, considering them as individual questions. Each is a concept in the course outline, like loop structures, functions, and file handling. Since the user referred to "7 questions," they might be focusing on these 7 concepts despite not providing images for all. I’ll prepare explanations for each of these bullet points, treating them as the core topics they refer to, even if they weren't included as original questions.

The user's request is a bit unclear, but it seems they want explanations for 7 tasks. While there are 5 unique code questions (9, 13, 14, 15), the bullet list has 7 topics (10-16). The user may be counting these as 7 questions, though they aren’t code-related. To cover everything, it feels safest to explain both the code questions and the bullet topics, totaling 12 points. I can address the image duplicates and provide a thorough explanation for all relevant items.

Thought for 2m 6s

Antwort

下面是图片里 5 道不同 Python 选择题的逐题解析与正确答案。
（我只在截图中看到 5 个不同的代码片段。如果还有两题没列出，请再发过来，我再补充。）

9．x = 1*2**3//4%5

步骤解释结果
2**3幂运算最高优先级8
1 * 8乘法8
8 // 4整数（向下取整）除法2
2 % 5取余2

答案：C. 2

13．x = 0x0011 ; print(x)

  • 以 0x 开头的是十六进制字面量。
  • 0x11 = 1 × 16¹ + 1 × 16⁰ = 17。
  • print 输出十进制整数 17。

答案：C. 17

14．

python
s = 'I:LIKE:PYTHON'
s.split(':')
  • str.split(sep) 会把原字符串按照分隔符拆分成 列表 list。
  • 结果：['I', 'LIKE', 'PYTHON']。

答案：A. 列表 [...]

15．

python
a = "Python 等级考试"
b = "="
c = ">"
print("{0:{1}{3}{2}}".format(a, b, 10, c))
  1. 占位符 {0:...} 表示用第 0 个参数 a 来填充。
  2. 花括号里的格式说明又引用了其他参数：
    • {1} → b ，即填充字符 '='
    • {3} → c ，即对齐符号 '>'（右对齐）
    • {2} → 10 ，即最小宽度 10
      → 等价于 "{0:= >10}"
  3. a 的实际长度是 11（包含空格和 4 个中文字符），已经大于宽度 10，不会再填充，直接原样输出。

最终输出：
Python 等级考试

答案：A. Python 等级考试

浮点比较

python
print(0.1 * 0.1 == 0.01)
  • 二进制浮点不能精确表示 0.1，运算结果是
    0.010000000000000002
  • 与 0.01 比较相等，得到 False。

答案：B. False

小结

  • 这几题考察了 运算符优先级、进制字面量、字符串方法、format 高阶用法以及浮点精度。
  • 真题里常见把格式化字符串里的“动态填充字符 / 对齐方式 / 宽度”拆开，让学生识别 fill 与 align 的位置；掌握后做题就会很快。

如果还有其他两道题目，请告诉我或补充截图，我会继续讲解！

Diesen Q&A teilen