落叶诗中诗人惊的原因

被减数、减数与差的和为200,差与减数的比为1:4,被减数、减数与差分别是多少? 用一张长18.84厘米,宽10厘米的长方形纸沿宽围成一个空圆柱,再配两个底面,这个圆柱的底面周长是（）厘米,高是（）厘米,侧面积是（）平方厘米,一个底面积是（）平方厘米,表面积是（）平 一张长方形的纸,长25,.12厘米,宽18.84厘米.用这张纸卷成一个圆柱.卷成的圆柱的底面积是多少平方厘米?(考虑两种情况) 用一张长25.12厘米、宽18.84厘米的长方形硬纸围成一个圆柱的侧面,加上底后,这个圆柱的容积最大是多少?急 食堂运进一批煤,如果用去这批煤的五分之二,剩下的比用去的多200千克,那么食堂原来运进煤多少千克? what is easy to get into but hard to get out of?55555555555555555 What is easy to get into but hard to get out of?（猜谜语） what is easy to get into but hard to get out of?这个谜语地答案希望准确 什么易进不易出?What is easy to get into but hard to get out of? The king 's military 缩写英文怎么写 Spell the word "English",____________. 1.They have 2 children.(改为同义句) _____ are four_____ in their family.2.Does he have a car?（改为同义句）_____ he _____ a car?3.She is studying in the classroom now.(用in the afternoon改写句子)She _____ in the classroom in the afte 情侣戒指上的be true to one's 1.Four children have a computer .Four children 划线提问2.Excuse me,where is the Jinmao Building?换一种说法.Excuse me,______can l______to the Jinmao Building? 对four children have aa computer中的 four children划部分提问 What is easy to get into but hard to get our ofA 是Water B A school C Trouble D A house What's easy to get into but hard to get out of?As mentioned above. 什么叫预埋铁件? excel函数问题:match(lookup_value,lookup_array,lookup_type)中的lookup_array查找范围怎么才可以实现不止在一列中查找?如范围可不可以是a1:b10. What season is the most dangerous? 3分之1-X与5分之2X+3互为相反数,求X的值 已知(x-3)/(x+1)(x-1)=A/(x+1)+B/(x-1) 求整数A、B的值 =VLOOKUP(B:B,数据库!B:K,4,0) excel中这个公式中的4表示什么,中B:B,数据库 B:k ,4 和0分别表示什么呢,? f（x）=x^2 x＜=0 1+2x x＞0 求积分∫0--＞2[f（x-1）]dx 求介词用法的详细解释啊`比如on with 在表示某方面的时候都怎么用啊 求 介词 只要介词和说明下介词属于什么的只需要告诉我介词及种类、不需要其他的说明、、谢谢、、{太乱我看不懂}我要介词、、如 时间介词；AT 不过我是想要把介词整理出来、那里太多 被减数减数差和为200差与减数比为1:4求3个数 减数与被减数与差的和是432,被减数与差的比是4比3,3个数各是多少? 曲线y=-根号4-x2(x≤0)的长度为 Liu Xiang has trained _____ a runner for many years.Now he is very famous.A.as B.like C.for D.with 信息检索步骤 文献检索的五个步骤是什么