下列说法不正确的是（　　）

世界上三种东西最宝贵——知识、粮食和友谊。我们要想取得优异的成绩，除了20%决定于智力因素外，还应该（   ）
①培养浓厚的学习兴趣       ②养成良好的学习习惯
③树立正确的学习目的       ④把所有时间都用有学习上 

【探究情境，明理践行】请你运用所学知识，对以下三个情境进行探究。

    Hello. I'm Xu Wei. This is my sister, Xu Yi. And this is my brother, Xu Feng. This is my bedroom. Look, that is my new dress on the bed. I like it very much. My shorts are on the chair. My jeans are on the chair, too. That sweater isn't my sweater. It's my sister's. She's Xu Yi. The sweater is beautiful. I'd like one.