1、在一个比例式中,两个外项都是质数,他们的积是39,其中一个内项是这个积的20%,这个比例式可以写作

题目

1、在一个比例式中,两个外项都是质数,他们的积是39,其中一个内项是这个积的20%,这个比例式可以写作
2、分数的分子、分母之和是38,吧分母各加上3,分子母的比是4：7,原分数是
3、王爷爷以每千克0.8元的价格购回一批苹果,经过挑选,把这批苹果分成了甲乙两等,甲乙两等的质量比3：5；乙等只能以0.7的价格出售,王爷爷也想要获得25%的利润,甲等苹果每千克应该卖多少钱?
4、根据所给的音标 写出下列单词中发这个音的字母组合
about yellow tree four turn
[au] cow [əu]coat [i:] team [c反过来:] floor [ə:] bird
5、单项选择
______her name?Her name is Lucy.
A.What's B.Where C.Who's D.Which
Let______look after this cat.
A.he B.his C.he's D.him
6、change,give,help,would,how,cost,like,anything,here's,buy
S:Good morning!Can I _____you?
M:Yes,please.I'd _____some apple.
S:What kind _____you like?
M:I'd like some apples from Shandong.
S:OK.Look,these apples are big and red.
M:Yes,I think so.They're nice._____me two kilos.
S:OK.______else?
M:Yes.Your fruit is cheap today I want to ______ some pears from Tianjin too.
S:_____many do you want?
M:Three kilos.How much do all they______?
S:Let me see.That comes to twenty-two yuan.
M:______the money.
S:Thank you and here's your______.

答案

1、在一个比例式中,两个外项都是质数,他们的积是39,其中一个内项是这个积的20%,这个比例式可以写作
13:5=(39/5):3
2、分数的分子、分母之和是38,吧分母各加上3,分子母的比是4：7,原分数是
解题过程如下：
假设这个分数的分子为a,分母为b
根据题意：a+b=38……（1）
(a+3)/(b+3)=4/7……（2）
由（1）可得：b=38-a,代入（2）中得：
7(a+3)=4(38-a+3)
解方程得：a=13,b=25
所以这个分数为13/25
3、王爷爷以每千克0.8元的价格购回一批苹果,经过挑选,把这批苹果分成了甲乙两等,甲乙两等的质量比3：5；乙等只能以0.7的价格出售,王爷爷也想要获得25%的利润,甲等苹果每千克应该卖多少钱?
甲等苹果每千克卖x元
3x+5*0.7=8*0.8(1+25%)
3x+3.5=8
3x=4.5
x=1.5
甲等苹果每千克卖1.5元
about yellow tree four turn
[au] cow (ow)about(ou)
[?u]coat (oa)yellow(ow)
[i:] team (ea)tree(ee)
[c反过来:] floor (oo)four(our)
[?:] bird (ir)turn(ur)
5、单项选择
______her name?Her name is Lucy.
A.What's B.Where C.Who's D.Which
A
Let______look after this cat.
A.he B.his C.he's D.him
let 是动词,后加宾语用him 所以是D
6、
S:Good morning!Can I _help____you?
M:Yes,please.I'd __like___some apple.
S:What kind _would____you like?
M:I'd like some apples from Shandong.
S:OK.Look,these apples are big and red.
M:Yes,I think so.They're nice.__Give___me two kilos.
S:OK.__Anything____else?
M:Yes.Your fruit is cheap today I want to __buy____ some pears from Tianjin too.
S:___How__many do you want?
M:Three kilos. How much do all they__cost____?
S:Let me see. That comes to twenty-two yuan.
M:__Here's____the money.
S:Thank you and here's your_change_____.