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STEAM教育|编程练习|每日一练(251)

  • 2026-02-05 13:07:42
STEAM教育|编程练习|每日一练(251)

每/日/一/练

  知识如海，学无止境  

  Scratch   

完整地播放两次小猫的叫声，以下哪个选项不能实现？（  ）

上

期

答

案

【上期答案】：C

【上期题目指路】：STEAM教育｜编程练习｜每日一练(250)

【题目解析】： 

选项A按下空格键后，大象向舞台左侧移动后能吃到橙子；选项B按下空格键后，大象向舞台左侧移动后能吃到草莓；选项C按下空格键后，大象向舞台右侧移动后能吃到苹果，符合题意；选项D按下空格键后，大象向舞台右侧移动后能吃到香蕉。因此选项C正确。

   python   

下面 Python 代码执行后的输出是 (   )。

A3

B4

C6

D7

上

期

答

案

【上期答案】：A.6

【题目指路】：STEAM教育｜编程练习｜每日一练(250)

【题目解析】：     

这是一道Python编程运算题，解题关键是理解`a += b+3`这个复合赋值运算符的运算逻辑，它等价于`a = a + (b + 3)`。 
 已知`a = 1`，`b = 2`。 
 先计算`b + 3`的值：b + 3 = 2 + 3 = 5。 
 再计算`a + (b + 3)`的值：a + (b + 3)=1 + 5 = 6，此时`a`被赋值为6。 所以运行程序后`a`的结果是6，答案选A。

   C++   

C++的整型N被赋值为5，语句printf("%d*2",N)执⾏后将输出10。（  ）

A 正确

B 错误

上

期

答

案

【上期答案】： A 正确

【题目指路】：STEAM教育｜编程练习｜每日一练(250)

【题目解析】：

按照题目所示的类型转换是可以完成对于正负整数和浮点数的正确类型转换，最后输出为整数类型的结果，故答案为正确。

快在评论里写出你本期的答案吧！

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  1. CONNECT:[ UseTime:0.000703s ] mysql:host=127.0.0.1;port=3306;dbname=f_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000922s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000318s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000248s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000578s ]
  6. SELECT * FROM `set` [ RunTime:0.000216s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000664s ]
  8. SELECT * FROM `article` WHERE `id` = 473522 LIMIT 1 [ RunTime:0.006381s ]
  9. UPDATE `article` SET `lasttime` = 1770438136 WHERE `id` = 473522 [ RunTime:0.023666s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000511s ]
  11. SELECT * FROM `article` WHERE `id` < 473522 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000678s ]
  12. SELECT * FROM `article` WHERE `id` > 473522 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000486s ]
  13. SELECT * FROM `article` WHERE `id` < 473522 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000841s ]
  14. SELECT * FROM `article` WHERE `id` < 473522 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.004339s ]
  15. SELECT * FROM `article` WHERE `id` < 473522 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.005137s ]
0.118808s