修改病句。1．太平洋绿龟长大后体重约在一百五十公斤左右。2．新

Question

修改病句。 
1．太平洋绿龟长大后体重约在一百五十公斤左右。
                                                                                                                                                    
2．新中国成立后，科学家已经为治理黄河描绘了方案。
                                                                                                                                                    
3．飞机设计师研制了具有优良性能的各种飞机。  
                                                                                                                                                    
4．通过本单元的学习，使全班同学明白了环保的重要性。
                                                                                                                                                    

Answer 1

1．去掉“约”；          2．把“描绘”改为“设计”；
3．把“各种”调整到“优良”前 ；           4．去掉“使”