按照各地规定，入托、入园乃至义务教育入学，通常都需要提供户口簿和出生医学证明。刘成提到，上海两岁可以入托，三岁可以上幼儿园，“没有出生证和户口通常上不了”。即便未来通过其他方式勉强落户，如果出生医学证明上父亲信息缺失，后续在学籍建立、升学材料审核时仍可能遇到障碍。
Dithering in its simplest form can be understood by observing what happens when we quantise an image with and without modifying the source by random perturbation. In the examples below, a gradient of 256 grey levels is quantised to just black and white. Note how the dithered gradient is able to simulate a smooth transition from start to end.
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2026-02-27 11:00:20
How could they work?
（五）伪造、变造船舶户牌，买卖或者使用伪造、变造的船舶户牌，或者涂改船舶发动机号码的。