有154个气球,白气球比红气球少3个,但白气球比绿气球多5个,这批气球只有三种颜色 ,那么红、白、绿气球各有多少个?（方

3/5:1/4:9/3=12:5:60=24:10:120各:24,10,120人;能生产:4*10=40套."
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1、设三轮车有x辆,由题意可得,小轿车也有x辆.则,
3x+4x=154
7x=154
x=22
答：三轮车和小轿车各有22辆
2、设莉莉今年x岁.则,
4.1x-0.8x=3
x=1
答：莉莉今年一岁
3、设甲箱原有梨x个,则乙箱原有梨2x个.
2x-6=x+6
x=12
乙箱： 2x=24
答：甲箱原有梨12个,乙箱原有梨24个
4、设较小的自然数为x,则较大的自然数为x+1.则,
x+(x+1)=65
2x=64
x=32
较大数为：x+1=33
答：两个自然数分别为32,33

设吴奶奶编了x个,那么李奶奶就是5/6 x个
（1+5/6）x=154
x=84
5/6 x=70
答：吴奶奶编了84个,李奶奶编了70个.

每五个一循环
154/5=30余4
所以从151-154排列是 白白白黑
最后一个（黑 ）颜色
每五个中有两个黑
所以30*2+1=61个
这种颜色的珠子在这串珠子中共有（61 ）个

功能词指在句子里发挥一定功能的词,常用的如转折,因果等,有多少个我就不知道,我列出了以下这些,每类知道其中几个常用的就可以了：
1)表层次:
first,firstly, to begin with, further, in the first place
second,secondly, to start with, still, furthermore
third,thirdly, what is more, last, last but not least
also, and then, next, besides
finally
2)表转折；
by contrast ,although ,though, yet,
at the same time ,but ,despite （the fact that）, even so
in contrast, nevertheless ,even
on the contarary ,however, in spite of
on the other hand, otherwise ,instead, still
regardless
3)表因果；
therfore ,consequently, because of, for the reason
thus, hence, due to ,owing to
so ,accordingly ,thanks to, on this account
since ,as, on that account ,in this way
for, as a result, as a consequence
4）表让步：
still ,nevertheless ,concession ,granted, naturally
in spite of ,all the same ,of course,despite
even ,so, after all
5)表递近：
furthermore, moreover, likewise, what is more
besides ,also, not only...but also...
,too ,in addtion
6)表举例：
for example, for instance ,for one thing that is
to illustrate, as an illustration ,a case in point
7)表解释：
as a matter of fact, frankly speaking ,in this case, namely,in other words
8)表总结：
in summary, in a word ,thus, as has been said
in brief, in conclusion ,altogether ,in other words
to conclude ,in fact ,finally ,in simpler terms
indeed ,in short ,in particular ,that is
in other words ,of course, on the whole, to put it differently,namely ,in all, therefore, to summarize
如果能帮到你,希望采纳!

（分析：鸡兔同笼共有54个头,告诉我们鸡和兔共有54只.
154个脚,说明鸡和兔的脚有154个.
生活常识：鸡有2个脚,兔有4个.）
设 有兔X只,则有鸡（54-X）只
4X+2（54-X)=154
（去括号得） 4X+108-2X=154
（合并同类项得） 2X+108=154
（移项得） 2X=46
X=23
兔：23只
鸡：54-23=31只
答：有兔23只,鸡31只.

小明两周共写了154个毛笔字,第一周每天写10个,第二周每天写x个. 7x表示(第二周一共写的字数),题中的等式关系式是(第一周一共写的字数+ 第二周一共写的字数=154 ),根据题意列方程为(7×10+7x=154 ).

I have been to visit Expo today.And I enjoyed it very much.The Expo site is made up of 154 pavilions.I visited USA Pravilion which is created by Rogers.It has 4 exhibition spaces.The first one is prologue part where is Mr.Felyor saying hello to vistors with enthusiasm.Then,the second part plays that Americans are stretching friendly hands to welcome everyone's coming.
最好加一个结尾.I think I will visit the Expo site again because its excitement and surprise.

是一个等差数列求和的问题 首项是76,末项是154,项数是40,公差是2
那么 S=(76+154)*40/2=460
一共设置了460个座位

这是一个由153个氨基酸构成的多肽链,由于每个氨基酸中含有一个氨基和一个羧基,所以153个氨基酸就会含有153个氨基和153个羧基,再加上R基上的一个氨基和一个羧基,所以参与构成该分子的氨基酸中至少有154个氨基和154个羧基.