已知关于x,y的方程组{2x-3y=3,ax+by=-1和{3x+2y=11,2ax+3by=3的解相同,求a,b的值。还有一篇英语短文
英语作文提示:假如你是Jim,一位英国男孩。请你根据提示,给LiLei写一封信,介绍你和你家人的情况。约50词以上1.有个弟弟和妹妹,妹妹叫Kate,弟弟叫John。我和...
英语作文提示:假如你是Jim,一位英国男孩。请你根据提示,给Li Lei写一封信,介绍你和你家人的情况。约50词以上
1.有个弟弟和妹妹,妹妹叫Kate,弟弟叫John。我和弟弟在同一个年级,但不在同一个班级;
2.父母是老师,教中文;
3.弟弟会说汉语,我只会说一点;
4.我喜欢看书;
5.我们每周上学5天,在星期天上午踢球,星期日晚上看电视;
6.尽快回信。
快点,我很急的 展开
1.有个弟弟和妹妹,妹妹叫Kate,弟弟叫John。我和弟弟在同一个年级,但不在同一个班级;
2.父母是老师,教中文;
3.弟弟会说汉语,我只会说一点;
4.我喜欢看书;
5.我们每周上学5天,在星期天上午踢球,星期日晚上看电视;
6.尽快回信。
快点,我很急的 展开
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解方程组{2x-3y=3,3x+2y=11
得x=3,y=1
代人ax+by=-1和2ax+3by=3得
3a+b=-1,6a+3b=3
解得a=-2,b=5
得x=3,y=1
代人ax+by=-1和2ax+3by=3得
3a+b=-1,6a+3b=3
解得a=-2,b=5
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2012-12-26
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Dear Li Lei
I'm Jim.I'm an English boy.I have a sister and a brother.My sister'name is Kate.My brother' name is John.My brother and I are in the same grade,but isn't in the same class.My parents are all Chinese teachers.My brother can speak Chinese and I can speak only.I like reading.
Please write soon
I'm Jim.I'm an English boy.I have a sister and a brother.My sister'name is Kate.My brother' name is John.My brother and I are in the same grade,but isn't in the same class.My parents are all Chinese teachers.My brother can speak Chinese and I can speak only.I like reading.
Please write soon
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Dear Li Lei
I'm Jim.I'm an English boy.I have a sister and a brother.My sister'name is Kate.My brother' name is John.My brother and I are in the same grade,but isn't in the same class.My parents are all Chinese teachers.My brother can speak Chinese and I can speak only.I like reading.
Please write soon
I'm Jim.I'm an English boy.I have a sister and a brother.My sister'name is Kate.My brother' name is John.My brother and I are in the same grade,but isn't in the same class.My parents are all Chinese teachers.My brother can speak Chinese and I can speak only.I like reading.
Please write soon
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