I have received three letters,one is from my uncle ____two are from my pen friends.a.the other.b.the others

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• I have received three letters,one is from my uncle ____two are from my pen friends.a.the other.b.the others
• I have received three letters,one is from my uncle ____two are from my pen friends.a.the other.b.the others
• 2、改错.(1)Dear Ann,Thank you of your e-mail.I'm glad to get it.1、_______Five others students in our chass have pen-friends 2、_______in other countrys,too.They also get e-mails from 3、_______their friends.One of the e-mail is from America,4、_______three of them are from Australian,and the other one 5、_______is from English.6、_______Now let me tell you something for my holiday.7、_______I go to Beijing with Dad and Mom last week.8、_______We visited Beihai
• 如图，O为坐标原点，直线l在x轴和y轴上的截距分别是a和b（a＞0，b≠0），且交抛物线y2=2px（p＞0）于M（x1，y1），N（x2，y2）两点． （1）写出直线l的截距式方程； （2）证明：1/y1+1/y2=1/b；
• I cant find the way to the subway station.I n a map.