我有六道奥数题不会做,哥哥姐姐们教教我

1.The first car was invented in 1886.
2.I received a letter from my friend yesterday.
3.My book is not the same as yours.
4.How tall are you?
5.How much do you weigh?
6.They have decided to go there by bus.

抢答了6次错了了次对了3次

x³+y³+z³-3xyz
(x²+1/8)²+2(x²+1/8)(x+1/8)+(x+1/8)²
已知m=2004×2005-1,n=2004的平方-2004×2005+2005的平方,并用简便算法比较m,n的大小 (x^3-1)+(x-1)(6x+11)
x*4-(8x*2+8)
计算2006^2-2005^2+2004^2-2003^2+2002^2-……+2^2-1^2

有没有限制乘数的个位?如果没有的话,还有1*2*3=6与1*1*6=6等等

小球下落到静止的总时间和总路程都是无穷大!
跳动永远不会结束!

x=3y代入x-y=1得3y-y=1y=1/2

A-F均有1题不答,做答5题
先分析得分：11’=4×3‘-1×1’；7‘=3×3’-2×1’；3‘=2×3’-3×1‘
E对4题错1题,AF对3错2,BCD对2错3 （这个贯穿整个分析）
再从高分的入手,比较A、E、F
比较AE,除去不答的①和⑤,只有②同③④⑥反,如②两人都错,则E的③④⑥都对A则全错,与A错2题矛盾.所以②的正解是（+）则F此题错,F与E都还有1题可错
比较EF,因①③同④反,按上面的分析方法可得EF的①③答（-）是正确的,A的③则错
前3题答案已得出,比较AEF的④⑤⑥,此时每人还可错一题.A的④⑥与E都反,必各有1对1错,所以A的⑤为（+）正确,F的⑤错.F的⑤错则F的④（+）正确,与A同对,E错.E的⑤错那么E的⑥（-）则正确,A错.
最后得到题目答案1（-）2（+）3（-）4（+）5（+）6（-）
依照答案,可知G6题全做,对4题错2题,4×3’-2×1‘=10分

1.一本书的页码用了1290个数字,这本书有几页?
2.化626为二进制数
3.求自然数中所有三位数的和
4.一个数的7倍加上4等于这个数加上4后的三倍,求这个数
5.求480的全部约数的个数以及全部约数的和
6.用1~36编排6阶幻方

三：X+6=8
X+6-6=8
X=8
这个错了
应该是：x+6=8
x+6-6=8-6
x=2
四5+X=4
5X=4
X=-0.8
这个也错了
应该是：5+x=4
x=4-5=-1
五：-X-10=-20
-X-10+10=-20
X=-20
这个也错了
应该是:-x-10=-20
-x-10+10=-20+10
-x=-10
x=10
其余的都对.

什么题目?是数学方面的还是其它理科涉及的不定积分

解题思路：由上表可知A、B、C各有1道未答，根据得分情况知，B对4道错1道，A、C各对3道错2道．因为A、B有3道的答案不同，且两人共错3道，所以两人的错误只能发生在①④⑥题上，由此得到另三道的正确答案：②√③×⑤√．对照表中信息，进一步推理，解决问题．

A、B、C各有1道未答，由得分情况知，B对4道错1道，A、C各对3道错2道．
因为A、B有3道的答案不同，且两人共错3道，所以两人的错误只能发生在①④⑥题上，
由此得到另三道的正确答案：②√③×⑤√．
对照知，C的②⑤题答错了，所以C答的其它题都正确，得到①×⑥√．
因为B就错1道，⑥题已错，故④题的正确答案为④×．
对照推出的正确答案，D对了4道错了2道，得8分．

点评：
本题考点： 逻辑推理．

考点点评： 根据表中给出的关系链，认真分析，逐步推理，解决问题．

5Ⅹ+3（30-Ⅹ）=100
5Ⅹ+90-3Ⅹ=100
2X=10
X=5
Ⅹ*（6分之5+8分之5）=30分之730Ⅹ*（6分之5+8分之5）=7
48*30Ⅹ*（6分之5+8分之5）=7*48
30Ⅹ*（40+30）=7*48
30*70Ⅹ=7*48
Ⅹ=4/25
3分之1Ⅹ+Ⅹ=36分之253分之4Ⅹ=36分之25
Ⅹ=25/48
3Ⅹ+5（15+Ⅹ）=30*43Ⅹ+75+5Ⅹ=120
8Ⅹ=45
Ⅹ=45/8
24%*4-50%Ⅹ=8分之58*24%*4- 8*50%Ⅹ= 8* 8分之5
8*24%*4- 4Ⅹ= 5
4Ⅹ=2.68
Ⅹ=0.64
------------------------------------------------------------------脱式计算（212-17）*（18分之1-15分之1）=195*（15-18)/(18*15）
=-39/18
1÷（5分之2-2分之1*4分之3）=(40*1)÷[40*（5分之2-2分之1*4分之3）]
=40÷（16-15）
=40
50%÷（2.6-60%）÷（8分之3+25%）=50%÷（2.6-0.6）÷（8分之3+8分之2）
=50%÷2÷（8分之5）
=1/2 * 1/2 *8/5
=2/5
48*（5分之4-4分之3）*15分之11=48*（20分之16-20分之15）*15分之11
=48*20分之1 *15分之11
=44/25

　有点不全,
　一、
　　1、（-2 1/2）+[（5/6）+（-0.5)+1 1/6]~一又六分之一,前面也是
　　2、（-0.7)+(-0.4)+(-0.3)+0.5
　　3.(-1/3)+1/4
　　4.(-27.9)-(-0.1)
　　5.(-1/27+2/9-1/3+5/6)x(-54)

　　6.(-2/3)/(-5 1/2)
　　7.(-1/4)/0.1-(-2/3)/3/4
　　8.(-9 30/31)x(-62)
　　9.-5.4x2/7-1.6x2/7
　　10.(-4)-(-8)
　　二、
学生问老师多少岁,老师说我像你这么大时你才2岁你长到我这么大时,我就35岁了,求老师年龄

把长72cm的铁丝围成一个长方形,使长比宽多10cm求长宽
某商品标价180元,以9折出售后仍获利20%,商品进价是多少?
小汤家三口人年龄之和是100岁,爸爸比妈妈大2岁,小汤比妈妈小25岁,求小汤一家三口年龄
某商店有两个进价不同的计算器都卖了80元,其中一个盈利60%,另一个亏损20%,这家商店赚了还是赔了?赚赔多少元?
足球比赛d的积分规则：胜一场得三分,平得一分,负得零分,一个队打12场,负3场,得了21分,这个队胜了几场?

#include
int main(void)
{
int x,a,b,c;
printf("请输入一个三位数："）;
a=x/100;
b=x%100/10;
c=x%10;
printf("逆顺序输出：%d%d%dn",a,b,a);
return();
}

1/2:1/3
=1/2×6:1/3×6
=3:2

设相遇时小球A的位移为s1,时间为t,小球b的位移为s2,根据题意有
s1+s2=12
s1=1/2gt^2
s2=vt-1/2gt^2
v=gt
化简得
t=根号30/5s

16x-40=9x+16
移项得：16x-9x=16+40
7x=56
x=8
4x=(20/3)x+16
移项得：-16=【8/3】x
x=-6
2(3-x)=-4(x+5)
6-2x=-4x-20
移项得：2x=-26
x=-13
3(-2-5)+2x=9
-6-15+2x=9
2x=30
x=15
1/2(x-4）-（3x+4)=-15/2
1/2x-2-3x-4=-15/2
5/2x=-3/2
x=-5/3
【x-7/4]-[5x+8/3]=1
x-7/4-5x-8/3=1
-4x=1+8/3+7/4
x=-65/48

您说的是不生不灭,不生当然不灭,但是您举的例子却是有生有灭,有生当然有灭,这不冲突啊.
我不知道这句经文出自何处,建议您先看到原文再说,以免断章取义.
经文如下：
阿难.汝犹未明一切浮尘,诸幻化相,当处出生,随处灭尽.幻妄称相,其性真为妙觉明体.如是乃至五阴六入,从十二处,至十八界,因缘和合,虚妄有生,因缘别离虚妄名灭.殊不能知生灭去来本如来藏.常住妙明,不动周圆妙真如性.性真常中求于去来迷悟生死,了无所得.
它说的并不是人的生灭,而是幻相的生灭,只有到了佛菩萨的境界才能看到物质的生灭,由于速度太快,人看不到,这和您说的是两回事.

初中英语总复习精选单选题100集
1 What do you think ______solve the problem ?
A.you can do B.can you do C.you can do to D.can you do to
2 In the past he often made his sister___, but now he is often made __by his sister.
A.to cry; to cry B.cry; cry C.to cry; cry D.cry; to cry
3 The teacher told us that the sun ____in the east.
A.rises B. rose C. raises D.raised
4 He lives in a village _____there are a lot of trees.
A. there B. where C.that D.which
5 He ________ Alice for ten years.
A. married to B.has married to C.has married D.has been married to
6 We need fifteen more people _____our team to do the job.
A.but B.except C.as well D.besides
7 They won`t allow us ________ at this beach.
A.swimming B.to swim C.swam D.swim
8 Is this factory ______you visited last week?
A.that B.where C.the one D.in which
9 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 D.for; that
10 Is the river_____ through that town very large?
A.which flows B.flows C.that flowing D.whose flows
11 The teacher told me that the students I wanted to see were seen___ football on the playground just now.
A.playing B.to be playing C.play D.to play
12 The red rose is the only one _____I really like.
A.which B.who C.that D.whom
13 All the apples _____ fell down were eaten by the pigs.
A.those B.which C.what D.that
14 Don`t forget the day ______you were received into the Youth League.
A.when B.that C.at which D.where
15 I prefer______ at home to _____outside.
A.staying, playing B.to stay, play C.staying, play D.to stay, playing
16 The box is _____what I saw in the shop.
A.same as B.the same like C.the same that D.the same as
17 The pen ______she writes letters is broken.
A.which B.that C.with which D.by which
18 Would you like to ______us in our discussion.
A.take part in B.join C.taking part in D.joining
19 I`m sure the red team will ______the game .
A.win B.beat C.defeat D.succeed
20 Ahead of me I saw a woman ____I thought was my aunt.
A.who B.whom C.of whom D.whose
21 _____your help, everything in the room is in good order now.
A.Since B.Because C.thanks for D.Thanks to
22 He is known to the world and has a lot of friends_______
A.in and out of abroad B.at home and abroad
C.at home and at abroad D.in home and out of abroad
23 ---Are you going there with them ? ----If you go,__________.
A.I also go B.so do I C.so I will D.so will I
24 -----The flower is beautiful. ---____________
A.So is it B.So it is C.It is so D.So it is
25 The number of people invited ____fifty, but a number of them _____absent.
A.were; was B.was ; was C.was; were D.were; were
26 We haven`t had any success _______
A.before long B.so long C.by far D.so far
27 Travellers ____our country enjoy the beautiful sights in Beijing, Hangzhou and
many other places of interest.
A.for B.to C.till D.by
28 If a man ______succeed, he must work as hard as he can.
A.will B.should C.is going to D.is to
29 ---I am sorry I didn`t do a good job. ---Never mind. ___ you have tried your best.
A.Above all B.In all C.At all D.After all
30 The best way to make sure that you can keep fit is to ____healthy eating habits.
A.find B.create C.develop D.prepare
31 We have spent _____money on English books .
A.a great deal of B.a good many C.a plenty of D.a number of
32 _______met, it won`t be easily forgotten.
A If only B.When if C.Once D.Once you were
33 The differences_____ these two pictures _____ colour are easy to see.
A.in, of B.from, of C.between ,in D.of ,in
34 You should put_____ “s” at the end of this word.
A.a B./ C.an D.the
35---What`s ______population of China ? ---China has____ population of 1.2 billion.
A.a; the B.the; a C./;/ D.the; the
36 It`s _______here. We can`t work long hours here.
A.very much cold B.much cold C.much too cold D.too much cold
37 _______terrible weather we`ve been having these days!
A.How a B.What a C.How D.What
38 ----Have you decided when_____? -----Yes, tomorrow morning.
A.will you leave B.to be leaving C.are you leaving D.to leave
39 The song ____My heart will go on is liked by the young people.
A.call B.calling C.called D.to call
40 Train services are now back to ______after three days of typhoon.
A.usual B.common C.ordinary D.normal
41 He is the best ____English in our class.
A.at B.in C.for D.to
42 The policeman caught hold of the thief and hit him ____ head.
A.in the B.on his C.on the D.in his
43 Did John hit Bob _____eye ?
A.in the B.on the C.in his D.on his
44There is ____ interesting ____ today`s newspaper.
A.anything …in B.nothing. .in C.something. .on D.nothing.. on
45 Has your teacher given you any advice______ your study?
A.in B.to C.on D.with
46 It`s bad manners to laugh _____ others when they are _____ trouble.
A.at ,in B.over ,at C.with ,on D.to, with
47 Betty doesn`t have enough money to buy that coat. It`s very ___.
The price is too_____.
A.high, high B.expensive, expensive C.expensive, high D.high, expensive
48 This kind of glasses manufactured by experienced craftsmen ______comfortably.
A.wearing B.wear C.wears D.is worn
49 The diamond is _______.
A.very valuable B.of great value C.great value D.A or B
50 Behind the dancer there was a woman _______a large diamond ring.
A.carrying B.dressing C.wearing D.having
51 The young teacher who has a ____face can make his classes ____and interesting.
A.lovely, lively B.lovely, lovely C.likely, friendly D.uglily, lively
52 They were still _____their friends after their child`s long illness.
A.in debt to B.in the debt to C.in debt with D.in the debt with
53 _______, my brother passed the exam.
A.To my great joy B.To my great surprised C.With my joy D.With my surprise
54 I am all ears, ____,I am listening to you with all attention.
A.in another words B.in the other words C.with other words D.in other words
55 He started early _______he could get there before nine.
A.in order that B.because C.so as to D.in order to
56 As you know,whether the person will be elected president is matter of ___interest.
A.general B.common C.ordinary D.mostly
57 I _____ by his story that he made up.
A.was taken on B.was taken out C.was taken in D.am taken in
58 He didn`t go into detail on the subject ,he spoke ______.
A.in general B.in particular C.in common D.in short
59 We designed the machine _____the purpose _______production.
A.for, of increasing B with, of increasing C. for, to increase D. A or B
60 Hospital doctors don`t go out very often as their work ____all their time.
A. takes away B. takes in C. takes over D. takes up
61 We offered him our congratulation ____his passing the entrance exam.
A. on B. for C. with D. at
62 My mother _____classical music while I am ____rock music.
A. is fond of, in B. likes, like C. is interested in; into D. interests; enjoy
63 We each _____ strong points and each of us on the other hand _____weak points.
A. have, have B. has, have C. has, has D. have, has
64 He is one of the students who, I am sure, always do ____ best.
A. his B. one`s C. my D. their
65 The police ___determined to bring back the missing boy when his family____
almost given hope.
A. is, has B. are, have C. are, has D. is, have
66 More than one girl ____ late for class this morning.
A. are B. is C. was D. were
67 Many a student _____ in the exam.
A. have failed B. had been failed C. has failed D. will be failed
68 What he says and what he does _______.
A. is not agree B. are not agree C. does not agree D. do not agree
69 Not only politics but also English is important. In other words , ___is important.
A. English, as well as politics B. English as well as politics
C. both politics and English D. politics, as well as English
70 It was at the very beginning__ Mr.Smith made a decision __we should send for a doctor.
A. what, that B. that, which C. which, that D. that, that
71 On the way back home from the ball, she suddenly found her necklace____.
A missed B losing C gone D be stolen
72 He didn`t go to the party not ______the time but _____he was ill.
A. because of, because B. because, because
C. because, because of D. because of, because of
73 The teacher gave me a piece of paper________.
A. to write on B. to be written on C. to write in D. to be written
74 I can`t believe he could jump _____high.
A. very much B. such C. that D. this
75 ----The boys are not doing a good job at all, are they? ----_____________.
A. I guess not so B. I don`t guess so C. I don`t guess D. I guess not
76 The magazine is ______reading, so he advised me ____it.
A. well worth; to buy B. very worth; buying
C. worthing , buying D. worthy, to buy
77 She is on a special ____to lose ____weight.
A.food; her B.food;/ C.diet; her D.diet;/
78 Jenny_____ a rich man. She has____ him for 5 years.
A.married with; married with B. married; married
C. married to; been married D. married; been married to
79 I am _____hungry. Give me _______of milk.
A.a bit;a little B.not a little;a bit C.little;a lit D.not a little; a little
80 A good friend is someone _____makes you ______.
A. which; happy B. who; happily C. who; happy D. whose; happily
81 He was about ____when suddenly the telephone rang.
A. to leave B. to starting C. leaving D. setting off
82 This task is _____difficult for us. We need ______people.
A. much too; another three B. too much; other three
C. much too; more three D. too much; three more
83 He seems to ______to Jane. He knows her well.
A. have been introduced B. be introduced C. have introduced D. introduced
84 This is a film ______Spielberg used real actors instead of stunt men.
A. which B. whose C. in which D. of which
85 He ____much of his success and happiness _____his wife and children.
A. thanks;to B. owes; to C. owns; to D. thinks; highly of
86 He will never forget the days ______he spent with you in Japan.
A. when B. that C. on which D. in which
87 Which sentence is incorrect ?
A. I feel interested in classical music B. I take interest in classical music
C. I am not into classical music D. I don`t fond of classical music
88 No one likes _______in _____public.
A. to be laughed at; the B. laughing at; the
C. being laughed at; / D. to be laughing at; /
89 We are considering _____a sports meet next month.
A. to hold B. holding C. to be held D. as holding
90 Which sentence is incorrect?
A. He devoted himself to the work of children`s health care.
B. He is devoted to his work.
C. He devoted all his life to work hard in people`s interests.
D. He is determined to make more money for his family.
91 He doesn`'t like classical music and_______ I.
A. so do B. nor do C. or do D. nor am
92 Friends should ______happiness and sorrow _____each other.
A share, with B solve, with C share, from D share, to
93 ---I missed the first part of the film .It was really a pity.
---You ________home half an hour earlier.
A. should have left B. must have left C. should leave D. must leave
94 The storm died away at last with the golden waves ____the shore in peace.
A. beaten B. beat C. to beat D. beating
95 The Whites are ___holiday ,but I don`t know where they have gone __their holidays.
A. in ,for B. on ,for C. for, in D. at, on
96 The river ____are covered with trees is very long.
A. which banks B. of which banks C. whose the banks D. the banks of which
97 She likes to use words ______clear to her.
A.of which the meaning B of which meaning
C whose of meaning D meaning of which
98 The price of this washing machine has been increased ____15%.
A. up B. to C. by D. from
99 _____someone`s health, you raise your glass.
A. Drink to B. To drink to C. If you drink D. If drink to
100 Please ______me about the interview____ I forget.
A. remind; in case B. remember; in case
C. remember, in case of D. remind of; in case of
参考答案：
1－5 CDABD 6-10 DBCBA 11-15 ACDAA 16-20 DCBAA
21-25 DBDBC 26-30 DBDDC 31-35 ACCCB 36-40 CDDCD
41-45 ACABC 46-50 ACCDC 51-55 AAADA 56-60 ACADD
61-65 ACDDB 66-70 CCDBD 71-75 CAACD 76-80 ADDBC
81-85 AAACB 86-90 BDCBC 91-95 BAADB 96-100 DACBA

注意用方程组解决哦
1.有一筐苹果分给若干小朋友,如果每位小朋友分到6个,那么还缺6个苹果；如果每位小萼片能够有分给5个,那么多余5个苹果,请你算算,有多少小朋友?有多少个苹果?
2.一个两位数．个位数字与十位数字的和为9,若交换个位数字与十位数字的位置,则所得的数比原数大9,求这两个数?
3.甲乙两人从相距28千米的两地同时出发,相向而行,经过3时30分相遇,若乙先出发2时,然后甲再出发,则在甲出发后2时45分两人相遇,求甲,乙两人的速度?
4.方程2x+3y=11的正整数解是＿＿＿＿＿＿＿＿＿＿＿
5.某企业将甲,乙两种不同性质和不同用途的存款共20万元存入银行,假设甲种存款的年利率为5.5％,乙种存款的年利率为4.5％,该企业一年可获得利息9500元,求甲,乙两种存款各是多少万元?
6.（中国古代数学问题）有人问某男孩：你有几个兄弟姐妹?男孩回答说：”我有几个兄弟就有几个姐妹．再问他妹妹相同的问题,妹妹回答说：”我的兄弟是我的姐妹的2倍．问这家共有兄弟和姐妹各几人?
注意乘用”*”表示,除以用”/”表示
问题补充：今天8：00之前回答出,求求你们,帮帮我
顺便答案也这你
1.设有小朋友x,苹果y个.依题意得:
(1)6x-6=y
(2)5x+5=y
解得:x=11,y=60.
经检验,符合题意.
答:有11个小朋友,60个苹果.
2.设十位数为x,个位数为y.依题意得:
(1)x+y=9
(2)(x+10y)-(10x+y)=9
解得:x=4,y=5.
经检验,符合题意.
答:十位数为4,个位数为5.
3.设甲的速度为每小时x千米,乙的速度为每小时y千米.依题意得:
(1)3.5x+3.5y=28
(2)2y+2.25x+2.25y=28
解得:x=3,y=5.
经检验,符合题意.
答:甲的速度为每小时3千米,乙的速度为每小时5千米.
4.(1)x=1,y=3.(2)x=4,y=1.
5.设甲存款为x万元,乙存款为y万元.依题意得:
(1)x+y=20
(2)5.5%x+4.5%y=0.95 (注:9500元=0.95万元)
解得:x=5,y=15.
经检验,符合题意.
答:甲存款为5万元,乙存款为15万元.
6.设这家有兄弟x人,姐妹y人.依题意得:
(1)x-1=y
(2)y-1=x/2
解得:x=4,y=3.
经检验,符合题意.
答:这家有兄弟4人,姐妹3人.

顺序：从上到下,由外到内,从大到小,由远到近. 表达效果：显得条理清晰.表达出春天的无处不在,春无私的奉献给了世间的一切.云,雷,雨,杜鹃,杜鹃花,柳絮.拟人,生动形象的表达出了对根要发芽,燕子回归的企盼.

1:( 0.5+x-y)(0.5-x+y)
2:(x^2+x-2)(x^2-x+2)
3:(a^2+2a-3)(a^2-2a+3)
4:[x(x-3)+4][x(x-3)-4]或者（x^2-3x+4)(x-4)(x+1)
5:(a+b)(a+b-c)
6:(m+n+p+q)(m+n-p-q)
小朋友.你是不是不好好学习啊
题都很简单啊.第4个拿不准.有点忘了.
你的这些题主要用了2个公式.记住就好了
第一个：（a+b)^2=a^2+2ab+b^2 或者 （a-b)^2=a^2-2ab+b^2
第二个：a^2-b^2=(a+b)(a-b)

fills
mine
B
C
A
B


保证准确率~

1.a.因为 whether.+or not
2.答案a少个to.
3.b是“着火”的意思.d.alight（着火的,照亮的）才和题意相符合.
4.creep有“蹑手蹑脚”的意思,和c（很安静）相匹配.
5.选c.只有c.（那就是为什么）是表示原因或者理由的,说明他为什么不能把车开进去.
6.d.最符合语法.a.no one可以做独立主语,后面不应跟of them.

1、错 真核生物中DNA和组蛋白结合形成染色体
2、对 高度的对称性和紧密的刚性结构一旦遭到破坏,DNA分子变性,那么粘度将会下降
3、错,说起来核酸拥有磷酸基团是会和碱反应,但是DNA是双螺旋结构,稀碱下比较稳定,RNA是直链,会迅速水解.
4、对 可以说相似但不是完全相同,DNA双螺旋是2条链,蛋白α-螺旋只是一条链而已,氢键在其中都起着不可或缺的作用.
5、对 戊糖平面和DNA双螺旋的长轴平行,而碱基平面几乎和长轴垂直.
6、对 含有内含子确实是真核生物基因的特点之一,从而保证了基因的多样性.

什么题

1.X=3(2的X次方乘以3的X次方=6的X次方=216,x=3)
2.x=6(根号下10的X次方=10000,10的X-2次方=10的4次方,x=6)

724-1=（712+1）（76+1）（73+1）（73-1）,
=（712+1）（76+1）（7+1）（72-7+1）（7-1）（72+7+1）,
=（712+1）（76+1）×8×43×6×57,
=（712+1）（76+1）×48×43×57,
因此可被40至50之间的两个整数整除的数是48,43．

1.一人一天铺180/5/3=12m
总量=240*80*12=230400m
调走后还剩240*5/6=200人
工作效率提高到12*（1+1/3）=16m/天
每天200*16=3200m
230400/3200=72天
80-72=8天
提前8天
2.设乙船每小时航行x千米
644-15*8-8x=380
x=18
乙船每小时航行18千米
3.设摩托车行驶x小时到达乙城
63.5x+44.2=374.4
x=5.2
摩托车每小时行驶374.4/5.2=72km
72-63.5=8.5km
4.设加xkg盐
40*8%+x/100-40-40*8%+x=0.2
x=10.2
则加水49.8kg
这题对错我也不太清楚

x+1=2
2x+2=4
3-2x=1
5x-5(1-x)=10
1+x+3(x+1)=3
3x+1=4x+2
x+1=2
2x+2=4
3-2x=1
5x-5(1-x)=10
1+x+3(x+1)=3
3x+1=4x+2

6. leave +形容词 表示让...维持某种状态
9. 是虚拟语气的用法 以及rather的用法
原文选项要表达的意思的是 我宁愿我没有做过
10 now and then 是偶尔,有时的意思
step by step 一步一步的
by and by 不久
more or less 或多或少,有点儿;大约
11.go on 继续下去；(时间)过去；发生
try out 试验
work out想出;解决;理解;发展
carry on 继续
work out比较适合语境
12 .C是一种风俗习惯 固定用法

1.总共logM64级（M是底数）,基取M时,对应的蝶形个数不同.例如若M=2,则有8个蝶形.
2.数字系统因果稳定极点在单位圆内,收敛域是一个圆外区域|z|>a,且收敛于必须包含单位圆在内,即：0

1.everyone
2.A clock.
3.The barber
4.Fog或Darkness
5.Tom is eighteen.George is sixteen.Sally is seventeen.Ann is fifteen.
6.A hole(洞).

UFO的太空人你要是能看到他的形状,就是有物质身体的就是人道啊

1+1=2
2+2=4
4+4=8
8+8=16
16+16=32
32+32=64
一共六道,请笑纳!

C是在本题指思想上~而B一般指物体穿透另一物体
2放松~hang out
3intrude into 强加于~
4A 严肃认真
5很复杂
6C有价值的东西 B是财产多为无形的屋子车子等 拿不动~要逃出国外了~

x" + 10x + 9 = 0x" + 10x + 25 - 16 = 0( x + 5 )" - 4" = 0( x + 5 + 4 )( x + 5 - 4 ) = 0( x + 9 )( x + 1 ) = 0x1 = -1x2 = -9 x" - x - 7/4 = 0x" - x + 1/4 - 8/4 = 0( x - 1/2 )" - 2 = 0( x - 1/2 - √2 )(...

1、甲抽题时共10选择6,3/5；
乙抽题时共9选择5,5/9.
事件概率=3/5*5/9=1/3.
2、事件的对立事件是B“甲乙都抽到判断题”.
同1中方法可求得P(B)=2/15；
所以该事件概率=1-2/15=13/15

2X+Y=15 3X+2Y=25

球上升1.25米.那你很容易就可以算出每个球在空中运动的时间是1秒,不要说你不会算.
因为老是有两个球在空中一个球在手里,那就是一秒内要抛出两个球.所用时间间隔就是0.5秒了

1.after supper
2.is absent
3.What's wrong
4.have a rest
5.a lot
6.will be ove

402+7590≈8000 5789-298≈5500 69×41≈2800 81.35÷9≈9
3.51+6.52+9.01+0.95≈20

1.1*2.2
2.3*12
3.7+23.4
2.09-1.3
11+3.4
5*2.3+24.1

1.Would you please tell like some more about it.
2.Don't forget to eat away.
3.Every day he forgot to bring English book.
4.Please put the bread to your classmates.
5.Please tell him the picnic.
6.To xishan picnic.

一、try to
二、quite a few taking
三、be handed in on time
四、stopped smoking
五、这是几个空?如果是五个空的话,就是：made a new year's plan
六、write International Journal a little
希望能帮到你

抢答了5次 答对了4次得20分 答错1次扣8分 总分12分