阅读短文，从每小题的选项中选出最佳选项
Carol studies at Roosevelt High School. She is having a hard time passing exams. She has no interest in her homework, so she seldom finishes it on time.
But there is one lesson she is doing well in. It is history. Carol always hands in her history homework on time. She respects the history teacher Mr Aragon. Carol feels that Mr Aragon treats her more than just a student. She feels other teachers look down on her.
Carol's mother Maria told Mr Aragon that Carol wasn't doing well in her other lessons. Mr Aragon was surprised to learn that. "She is such a smart girl," he told Maria. Mr Aragon told Maria that he would talk to her daughter.
Carol felt embarrassed when Mr Aragon talked to her about the problems she was having in other lessons. But later Carol understood that Mr Aragon just wanted to help her. Mr Aragon and Carol had a discussion about what she could do to improve her marks in other lessons. They made a list of ways to help her to complete her homework on time, including setting a timetable for homework, cutting down some boring after-school activities, and having a friend help her with the homework. Carol decided to try these ways out to see which one would work best for her.
、
是不同的平面，
、
是不同的直线，则下列命题不正确的是 （ ）