人接受试验,结果478人有效。综合A,B两家医院的试验结果,哪种药的疗效好?
4. 某种商品按定价卖出可得利润960元,若按定价的80 %出售,则亏损832元。问:商品的购入价是多少元?
5.小明说,今年他的年龄比爷爷的还小3岁.已知小明今年15岁,爷爷今年多少岁?(列方程解)
6. 如图,在长为490米的环形跑道上,A、B两点之间的跑道长50米,甲、乙两人同时从A、B两点出发反向奔跑.两人相遇后,乙立刻转身与甲同向奔跑,同时甲把速度提高了25%,乙把速度提高了20%.结果当甲跑到点A时,乙恰好跑到了点B.如果以后甲、乙的速度和方向都不变,那么当甲追上乙时,从一开始算起,甲一共跑了多少米?
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参考答案
一、填空题。(1-2小题每空1分,3-8小题每小题2分,共18分) 1. 3.5 617 52 2. 24 8 80 3. 60 4. 126或294. 5. 9 6. 20 7. 黄 8. 2088 二、选择:(每题2分,共10分) 1.C 2.C 3.D 4.D 5.D 三、算一算。(共36分)
111. 36 30.59 32 10 7 11.4 0.16
92212. 243 22 18
12253. 20 1 40
4. 7-7×3.14÷4=1.505(平方厘米) 5.10×10÷2=50(cm2)
四、应用题。(每小题6分,共36分) 1. 设如果要站成10排,每排应站x人. 15:x=10:8 x=12(人)
答:如果要站成10排,每排应站12人.
1112. ÷[(÷7)+(÷6)]≈8(天) 244答:甲、乙合做,大约8天完成工程的一半。 3. 甲:(6 + 40) ÷ (20 + 80) =46%;乙:(2+478) ÷(10+990)=48% 48% >46%,所以乙种药的疗效好 4. 设:商品的购入价是x元.
(x+960) ×80%=x-832 x=8000(元) 答:商品的购入价是8000元. 5. 设爷爷今年x岁.
×x﹣3=15 x=63 答:爷爷今年63岁
6. 解:相遇后乙的速度提高20%,跑回B点,即来回路程相同,乙速度变化前后的比为
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5:6,∴ 所花时间的比为6:5。
设甲在相遇时跑了6单位时间,则相遇后到跑回A点用了5单位时间。设甲原来每单位时间的速度V甲,由题意得:
6V甲+5×V甲×(1+25%)=490,得:V甲=40。
从A点到相遇点路程为40×6=240,所以 V乙=(490-50-240)÷6=两人速度变化后,
甲的速度为40×(1+25%)=50, 乙的速度为
100。 3100(1+20%)=40, 3从相遇点开始,甲追上乙时,甲比乙多行一圈, ∴ 甲一共跑了490÷(50-40)×50+240=2690(米)
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2019年小升初英语模拟试题及答案
(后附听力材料)
(试卷满分100分,考试时间60分钟)
听力部分(总分30分)
一、听录音,选出你所听到的单词。(每小题1分,共5分) ( )1. A. hobby B. hurry C. really ( )2. A. moon B. line C. million ( )3. A. some B. sometimes C. sounds ( )4. A. flag B. square C. stamp ( )5. A. clean B. collect C. clap 二、听录音,给下列图片标上序号。(每空1分,共10分)
( ) ( ) ( ) ( ) ( )
( ) ( ) ( ) ( ) ( ) 三、听录音,填单词,补全句子。(每小题1分,共5分) ( )1. –These ________ are great. --Yes, they on. ( )2. There are lots of ________restaurants there. ( )3. Do you _________ stamps? ( )4. We always have a special_________. ( )5. This is my __________in China.
四、听录音,判断对(√)错(X)。(每小题2分,共10分) ( )1. Sue is a Chinese girl of eleven. ( )2. She is in Class Two, Grade One.
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( )3. Her good friend is a boy of thirteen.
( )4. They are in the same class of the same school. ( )5. Miss Lin is their English teacher.
笔试部分(总分70分)
四、找出与其他单词的画线部分读音不同的一项。(10分) ( )1.A.sweater B.please C.teacher ( )2.A.now B.yellow C.how ( )3.A.they B.three C.mother ( )4.A.books B.classes C.maps ( )5.A.yes B.your C.my 五、选择题。(10分)
( )1.The reason ____he was absent from the meeting was ____his car broke down on the way.
A. that; because B. why; that C. that; that
( )2.Do you know___________?
A. who he is B. who is he C. what he like
( )3.Don’t forget the day ______you were received into the Youth League.
A.when B.that C.at which
( )4.All the apples _____ fell down were eaten by the pigs.
A.those B. that C.what
( )5.___________ a black cat.
A.This B. That C.Here’s
( )6.If I ____ you tomorrow, I will give you the receipt.
A. see B. will see C. am seeing
( )7.Do you know ______ this word?
A. what to spell B. how to spell C. to spell
( )8.He asked me _____ I would like a cup of tea.
A. that B. what C. if
( )9.The red rose is the only one _____I real like.
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