【简答题】People with higher levels of education earn more, have more control over their f_____, and have healthier and better-educated children. (the ability to produce offspring, esp abundantly)
【单选题】很多生物性的污染威胁到了人们的食品安全,但不包括()。
【单选题】This teaching method is being _______ in several schools to help children with disability obtain higher education.
【简答题】诗歌素有“三美”之说,指的是音乐美、( )、建筑美。
【简答题】链传动由 组成 ,齿轮渐开线上任意一点法线必然与 相切,基圆半径越小,渐开线越 。
【单选题】关于三视图形成,三视图中最主要的是俯视图的说法是( )的