Scholars from the University of Kansas published the results of a decade_long Study recently,suggesting that sending, children to pre-school at the age of 4 comes too late to_educational drawbacks at home.

13岁的初中生小张上学路上破坏了公交站牌，侵犯了公共财产权益，违反了治安管理规定，对此事件下列说法不正确的是()

受人之托，代人理财“是（）的基本特征

风力大于()，或湿度大于80%时，不宜带电作业。

民主，即()上要实现人民当家作主，这是中国特色社会主义的生命之魂。