第103(用英语怎么写?)

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看完这篇英语短文,新概念英语第一册 第103课GARY:How was the exam,Richard?RICHARD
看完这篇英语短文,
新概念英语第一册 第103课
GARY:How was the exam,Richard?
RICHARD:Not too bad.
I think I passed in
English and Mathematics.
The questions were very easy.
How about you,Gary?
GARY:The English and Maths papers
weren't easy enough for me.
I hope I haven't failed.
RICHARD:I think I failed the French
paper.
I could answer sixteen of
the question.
They were very easy.
But I couldn't answer the rest.
They were too difficult for me.
GARY:French test are awful,aren't
they?
RICHARD:I hate them.
I'm sure I've got a low mark.
GARY:Oh,cheer up!
perhaps we didn't to do badly.
The guy next to me
Wrote his name
at the top of the paper.
RICHARD:Yes?
GARY:Then he sat there
and looked at it for three
hours!He didn't write a word!
今天就要用,谢
问题提完还要加中文,不然我是看不懂的 还有,
biao13ti1年前1
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what subjects does RICHARD think he can pass?
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is french hard to RICHARD
and who think french is awful?
why GARY said they didnot need to do badly?
the guy next to GARY did what?
人教版七年级下数学书上的第103的7题 104的8题 9题,有答案就打没答案就别乱发言,
人教版七年级下数学书上的第103的7题 104的8题 9题,有答案就打没答案就别乱发言,
二元一次方程组解
7题
甲乙两人相距6千米,两人同时相向而行,一小时后相遇,同时出发同向而行,甲三小时可以追上乙,两人的平均速度各是多少
8题一种蜂王精有大小盒两种包装,三大盒和四小盒共装108瓶,两大盒和三小盒共装76瓶,大盒和小盒共装多少瓶
9题一个长方形的长减少四厘米,宽增加两厘米就可以成为一个正方形,并且这两个图形的面积相等这个长方形的长,宽各是多少
涵江心1年前6
白莲钰 共回答了17个问题 | 采纳率88.2%
7
设甲的速度为x千米/时,乙的速度为y千米/时,则
3x-3y=6(1)
x+y=6(2)
由(2)得x=6-y
代入(1)得一元一次方程3(6-y)-3y=6
化简得18-3y-3y=6
解得x=4,y=2
答:甲的速度为4千米/时,乙的速度为2千米/时.
8
设大盒X 小盒Y 根据题意得
3X+4Y=108(1)
2X+3Y=76 (2)
解,用①式-②式得
X+Y=32
侧 X=32-Y
把 X=32-Y 代入②式得
2(32-Y)+3Y=76
64-2Y+3Y=76
解得Y=12
把Y=12代入 X=32-Y
得 X=20
X=20 Y=12
答大盒有20 小盒12
9
设长方形的长为 x cm,宽为 y cm,根据题
意得:(x-5)×(y+2)=x×y ①
x-5=y+2 ②
解这个方程组,得:x=25/3
y=4/3
答:这个长方形的长为3分之25 cm,宽为3分之4cm
注:25/3,应该表示为八又三分之一, 4/3,应该表示为一又三分之一.