I have some advice有什么错误?我作文里写了这样一句话,请问有什么错误?

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• 请帮忙看看这段英语作文有什么语法错误的地方我自己写的英语作文,想练习练习,没有老师给我修改,所以想请帮帮忙.如下：In our life,we may have many experiences.They affect our fellings often.They can make us happy or sad.The bad feeling is bad for our health.So we must stay in good spirits.Here are some suggestions:1.I like music a lot.So I think music can make me happy again.2.Talk with friends is a useful idea.You can get some help from them.3.I will feel happy when I wear my favorite clothes.I think you will
• 关于正交向量的问题1.求与和都正交的两个单位向量.2.点Q和R在直线L上,点P不在L上,证明点P到直线L的距离d为d=ㅣa*bㅣ/ㅣaㅣ 这里a=QR b=QP此证明我会做,所以无需证明.我要问的是 点P到直线L的距离d其实就是b在a上的投影大小,如果是这样的话,按照公式,d应该等于a.b/ㅣaㅣ但此题中证明的却是d=ㅣa*bㅣ/ㅣaㅣ,请问这两个公式分别在什么情况下使用?一楼的方法我早就尝试过，是错误的，不过还是谢谢了。刚才忘了说，第一题的正确答案是和。三楼的答案是正确的.但是有一句话还是不懂."与两个向量都正交的向量是a＝k(2，－1)，单位化得所求向量是 ±1/√6（2,1,-1）",我在国外,用的是英文教材,这句话里的一些专业词汇不太懂.单位化是什么，如何求得最后答案的？以及一楼所说的a*b和b*a垂直于a和b的方法为什么是错的？真是太谢谢你了。
• I have some advice有什么错误?我作文里写了这样一句话,请问有什么错误?
• I have some advice for you 正确 还是 I have some advice to you
• One day,a man went home to his wife and said ,I have bought something for you ,Oh,thank yousaid his wife .what have you bought I have bought a gold ring .Here it is He help it out for his wife to see .Then he dropped it .Oh dear!he said .I have dropped it he began to look for it on the floor,but it was dark inside the house and he couldn`t see anytuing.So he went outside the house and began to look for the ring in the street.Just then a friend came sa