同桌by蔺思甜
@米超6811：用英语写一段介绍自己同桌的品质,例如,他很诚实,他很友好,他很 -
骆泽13814509100…… My deskmate is Nancy. She is a lovely girl. We are deskmates and friends. Nancy is a new student of my class. She comes to my class only two weeks. My teacher let her sit near me. At first, I didn't like her, because she was quiet. But, as time goes ...
@米超6811：王老师访问六年级学生小明,小明说他们年纪共有100多位同学,老师请同学们按照三人一行排队,结果多一人.按照五人一行排队,结果多两人,按七人一... - 作业帮
骆泽13814509100…… [答案] 共有学生127人.
@米超6811：甲乙两位同学解同一个方程组,ax - by=3(1) bx - ay=1 (2)甲同学的解为 x=2 y= - 1 ;乙同学的解为 x= - 1 y=0.老师看了他们的解题过程后,说:“两个同学都太粗... - 作业帮
骆泽13814509100…… [答案] 甲同学把方程(2)抄错,那么对于方程(1),甲的解是成立的,代入,有2a+b=3 同理乙同学把方程(1)抄错,对于方程(2),乙的解是成立的,代入,有-b=1 联立以上两个方程,解得a=2,b=-1,代入ax-by=3(1) bx-ay=1 (2),得 2x+y=3 (1) -x-2y=1 ...
骆泽13814509100…… My deskmate is Nancy. She is a lovely girl. We are deskmates and friends. Nancy is a new student of my class. She comes to my class only two weeks. My teacher let her sit near me. At first, I didn't like her, because she was quiet. But, as time goes ...
@米超6811：王老师访问六年级学生小明,小明说他们年纪共有100多位同学,老师请同学们按照三人一行排队,结果多一人.按照五人一行排队,结果多两人,按七人一... - 作业帮
骆泽13814509100…… [答案] 共有学生127人.
@米超6811：甲乙两位同学解同一个方程组,ax - by=3(1) bx - ay=1 (2)甲同学的解为 x=2 y= - 1 ;乙同学的解为 x= - 1 y=0.老师看了他们的解题过程后,说:“两个同学都太粗... - 作业帮
骆泽13814509100…… [答案] 甲同学把方程(2)抄错,那么对于方程(1),甲的解是成立的,代入,有2a+b=3 同理乙同学把方程(1)抄错,对于方程(2),乙的解是成立的,代入,有-b=1 联立以上两个方程,解得a=2,b=-1,代入ax-by=3(1) bx-ay=1 (2),得 2x+y=3 (1) -x-2y=1 ...
