【单选题】Old Mothers' Children Have Higher Diabetes (糖尿病) Risk Children of older mothers run a higher risk of developing insulin-dependent (胰岛素依赖型的) diabetes, the British Medical Journal said. 'A strong associ...
【简答题】How poverty could limit learning Studies have shown that children from poor families have more difficulty in school than other boys and girls. Children with higher socioeconomic roots seem better (1) ...