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A PHP Error was encountered

Severity: Notice

Message: Trying to access array offset on value of type null

Filename: models/Site_model.php

Line Number: 233

Backtrace:

File: /var/www/html/KOL/voice/application/models/Site_model.php
Line: 233
Function: _error_handler

File: /var/www/html/KOL/voice/application/controllers/Exitpage.php
Line: 110
Function: get_keyword_cat

File: /var/www/html/KOL/voice/public/index.php
Line: 319
Function: require_once

疑難雜症萬事通 - 全班學生有34人張老師要學生分成八組進行教學活動每組可以4人一組或5人一組請問4人一組與5人一組各幾組可以將全班學生分完 - 前往 https://www.topmath.org/j/02k02/teacher/01020201.pdf
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