1、图中,直线上依次有A、B、C、D、E、F六个点,且AB=a,BC=b,CD=c,DE=d,EF=e,求图中所有线段长

1、图中,直线上依次有A、B、C、D、E、F六个点,且AB=a,BC=b,CD=c,DE=d,EF=e,求图中所有线段长度的和（用a、b、c、d、e求长度）（这图凑合着看看吧）
━A━━━B━━C━━━━━D━━━E━F━
a b c d e
2、一个长方体的长是8厘米,宽是长的4分之3 ,高是宽的75%.求：这个长方体的表面积.
3、互为余角的两个角的差为15°,求：
(1)较大角的补角的度数； (2)较小角的补角与较大角的补角的差.
4、在-5分之3 之间插入三个数,使这五个数中每相邻两个数的差都相等,求插入的这三个数.
5、用甲、乙、丙三种糖果按2∶4∶3的比,混合成135千克什锦糖,问需要甲、乙、丙三种糖果各多少千克?
6、今天小丽一家人的岁数总和是100岁,爸爸比妈妈大5岁,妈妈的岁数是小丽岁数的4倍少2岁,则小丽和爸爸,妈妈今年各几岁?
7、小丽家安装了分时电表,每天早上6：00到晚上22：00为平时段,每度电0.61元,其余时间为谷时段,每度电比平时段便宜0.31元,以知小丽家谷时段的耗电量是平时段的½ ,本月共付电费100.32元,求小丽家本月的耗电量.
8、体育场有一环形跑道长400米,甲、乙两人练习长跑,甲每秒跑8米,乙每秒跑7米,两人在相距60米的地方同时同向而行,多少秒后两人第一次相遇?
( ) 1.I have a friend and she can’t read _______ write.
A.and B.but C.or D.so
( ) 2.Jenny and Alice like ______________ together.
A.be B.to C.in D.to be
( ) 3.Don’t sit between ______________________.
A.you and me B.you and I C.me and you D.I and you
( ) 4._______ your father ________ Hong Kong yet?
A.Has…been to B.Has…gone to C.Does…go D.will… go
( ) 5.We’ll have a visit ____________ the Bund next week.
A.to B.in C.on D.from
( ) 6.It’s raining outside,so our teacher tells us _____________ football.
A.don’t play B.doesn’t play C.to not play D.not to play
( ) 7.The students __________ rubbish to look after the environment.
A.put up B.get up C.pick up D.look up
( ) 8.Mum always keeps our bedroom ___________.
A.cleaning B.cleans C.to clean D.clean
( ) 9.–What about a trip to Ocean Park?–___________________________.
A.I’m sorry.B.All right.C.Excuse me.D.Thank you.
( ) 10.He has worker in Shanghai for _____________ hour.
A.the B.an C.a D./
( )1.____ man over there is our new English teacher.He is ____ European.
A.The; an B.A; a C.A; / D.The; a
( )2.Sheep are very important in our life.We can get wool ____ them.
A.from B.on C.in D.with
( )3.“Help ____ to some chicken,boys and girls.” Mrs.Green said.
A.you B.Yours C.yourself D.yourselves
( )4.Kitty is going to buy ____ for her new flat.
A.a furniture B.some furniture C.a piece furniture
D.some furnitures
( )5.The Earth is our home.People should stop ____ it.
A.pollute B.Pollution C.polluting D.to pollute
英语选择题别给我ABCD乱写啊,我要的是正确率啊,

1、图中,直线上依次有A、B、C、D、E、F六个点,且AB=a,BC=b,CD=c,DE=d,EF=e,求图中所有线段长度的和（用a、b、c、d、e求长度）（这图凑合着看看吧）
━A━━━B━━C━━━━━D━━━E━F━
a b c d e
图中所有线段及其长度如下：
AB=a
AC=a+b
AD=a+b+c
AE=a+b+c+d
AF=a+b+c+d+e
BC=b
BD=b+c
BE=b+c+d
BF=b+c+d+e
CD=c
CE=c+d
CF=c+d+e
DE=d
DF=d+e
EF=e,
所有线段长度相加得所有线段的和为5a+8b+10c+8d+5e
2、一个长方体的长是8厘米,宽是长的4分之3 ,高是宽的75%.求：这个长方体的表面积.
长:8,宽:8x3/4=6,高:6x75%=64.5
S=(8x6+8x4.5+6x4.5)x2=222
3、互为余角的两个角的差为15°,求：
(1)较大角的补角的度数； (2)较小角的补角与较大角的补角的差.
设较大角为X度,所以x-（90度-x）=15,x=52.5度
因为较大角是52.5度,所以它的补觉是127.5度
较小角是37.5度,所以它的补角是142.5度
所以差为15度
4、在-5分之3 和5分之2 之间插入三个数,使这五个数中每相邻两个数的差都相等,求插入的这三个数.
设每两个数之间的差为x
则,-3/5 +4x=2/5
解得到x=1/4,
所以这三个数是分别是-7/20 ,-1/10 ,3/20
5、用甲、乙、丙三种糖果按2∶4∶3的比,混合成135千克什锦糖,问需要甲、乙、丙三种糖果各多少千克?
2+4+3=9
则需要甲:135 x 2/9=30
乙:135 x 4/9=60
丙:135 x 3/9=45
6、今天小丽一家人的岁数总和是100岁,爸爸比妈妈大5岁,妈妈的岁数是小丽岁数的4倍少2岁,则小丽和爸爸,妈妈今年各几岁?
设小丽今年x岁,则妈妈为4x-2 岁,爸爸4x-2+5 岁
依题意得
x+4x-2+4x-2+5=100
解得x=11
所以妈妈42岁,爸爸47岁
7、小丽家安装了分时电表,每天早上6：00到晚上22：00为平时段,每度电0.61元,其余时间为谷时段,每度电比平时段便宜0.31元,以知小丽家谷时段的耗电量是平时段的½ ,本月共付电费100.32元,求小丽家本月的耗电量.
设平时段耗电量为x度,则谷时段耗电量为1/2x度
依题意得 0.61x+（0.61－0.31）× 1/2x=100.32
解得 x=132
1/2x＝66
66+132=198
所以本月平时段耗电量为132度,谷时段耗电量为66度,总耗电量为198度.
8、体育场有一环形跑道长400米,甲、乙两人练习长跑,甲每秒跑8米,乙每秒跑7米,两人在相距60米的地方同时同向而行,多少秒后两人第一次相遇?
设x秒后相遇
依题意得
7x+60=8x
解得x=60
所以六十秒后两人第一次相遇
( C ) 1.I have a friend and she can’t read _______ write.
A.and B.but C.or D.so
( D ) 2.Jenny and Alice like ______________ together.
A.be B.to C.in D.to be
( A ) 3.Don’t sit between ______________________.
A.you and me B.you and I C.me and you D.I and you
( A ) 4._______ your father ________ Hong Kong yet?
A.Has…been to B.Has…gone to C.Does…go D.will… go
( B ) 5.We’ll have a visit ____________ the Bund next week.
A.to B.in C.on D.from
( D ) 6.It’s raining outside,so our teacher tells us _____________ football.
A.don’t play B.doesn’t play C.to not play D.not to play
( C ) 7.The students __________ rubbish to look after the environment.
A.put up B.get up C.pick up D.look up
( D ) 8.Mum always keeps our bedroom ___________.
A.cleaning B.cleans C.to clean D.clean
( B ) 9.–What about a trip to Ocean Park?–___________________________.
A.I’m sorry.B.All right.C.Excuse me.D.Thank you.
( B ) 10.He has worker in Shanghai for _____________ hour.
A.the B.an C.a D./
( A )1.____ man over there is our new English teacher.He is ____ European.
A.The; an B.A; a C.A; / D.The; a
( B )2.Sheep are very important in our life.We can get wool ____ them.
A.from B.on C.in D.with
( D )3.“Help ____ to some chicken,boys and girls.” Mrs.Green said.
A.you B.Yours C.yourself D.yourselves
( B )4.Kitty is going to buy ____ for her new flat.
A.a furniture B.some furniture C.a piece furniture
D.some furnitures
( C )5.The Earth is our home.People should stop ____ it.
A.pollute B.Pollution C.polluting D.to pollute