Delete row item_mock_m4_003 from assignment_items

id item_mock_m4_003
assignment_id asgn_math_mock
child_id child_5b46b9f7
item_type short_answer
parent_id item_mock_m4_000
sort_order 303
title 学校运来 7/10 吨沙子，铺路用去了 2/5 吨，砌墙用去了 1/4 吨。还剩多少吨沙子？
content
status pending
created_at 2026-06-14 14:23:29
updated_at 2026-06-14 14:23:29
major_index
ocr_major_title
major_score 0.0
subject 数学
section yingyong
options []
correct_answer
image_idx 0
page_number 4
score 6.0
extra_content []
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