短文改错
假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文,文中共有l0 处语言错误，每句中最多有两处。每处错误仅涉及一个单词的增加、删除或修改。
增加：在缺词处加一个漏字符号（∧) ，并在其下面写出该加的词。
删除：把多余的词用斜线( ＼) 划掉。
修改：在错的词下划一横线，并在该词下面写出修改后的词。
注意：1． 每处错误及其修改均仅限一词；
2 ．只允许修改l0 处，多者( 从第11 处起) 不计分。
Dear Fangfang,
I’m sorry to learn that you were not getting on well with your English study recently. I’d
like to give you some advice on learning English.
First of all, you should be confidently in yourself, which is ? first step in learning English well.
Secondly, you’d better make friends with the students who are good at English, so they are
very likely to helping you when you meet difficulties．Thirdly, learning English well is a long
process.Remember: to reward yourself when you have made progress, that will inspire you
greatly.Anyway, you must work hard on English and never give up learning it.Just believe
in yourselves.Where there is a will, there is a way.
Hope my suggestions will give you some of help．
Sincerely yours,
Li Ming
，所以实验中需要测量路程和时间．实验中要测量路程需要刻度尺，测量时间需要用秒表．为了使小车下滑速度不至于太快，以免下滑时间过短不便测量，故在实验时，斜面应保持很小，以便于测量时间．