11周岁的张某未事先征得法定代理人的同意，将其价值3 000元的学习机赠送给同学李某。该赠与的效力为（ ）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='25047' and id < 2131522 and id<>'2131522' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='25047' and id > 2131522 and id<>'2131522' order by id asc limit 5