普朗特数pr

利用4 6 9 5运用加减乘除计算出24 将长方体沿着对角线用一个平面切开,所得截面中互相平行的线段有()组 John receive an invitation to dinner ,and with his work（）he gladly accepted it 用having finished 还是finished为什么? John received an inwitation to dinner,and with his work ___,he gladly accepted it. John received an inwitation to dinner,and with his work ___,he gladly accepted it.A finished B finishing Chaving finished D wa 看到这些农具你想到哪些诗句?1.镰刀___________2.犁____________ John received an inwitation to dinner,and with his work ___,he gladly accepted it.A finished B finishing Chaving finished D was finished可不可以用having been finished 看到这些农具你想到哪些诗句?1.镰刀 学校要修一条水泥路,修了全长的九分之一,还多15米,这时没有修的正好是修好的5倍,这条路有多少米? 一种商品涨价百分之十后又下跌了百分之十,现在售价297元,该商品原价?方程 一个月内,某商品涨价10% 后又下跌10%,现售价297元,求原价 一价上衣300元是原价的五分之四原价比现价高出百分之几 1件上衣原价125元,现价卖100元,这件上衣便宜了百分之几? 看到这农具,你想到了哪句诗1.镰刀___________2.犁____________? 求教 I received an invitation,but I did not accept it谢! extending invitation 用英语写出5句有关它的解释! AC=AD,角C=角D,求证BC=BD 角c等于角d,ac等于ad,求证:bc等于bd. 如图,AC=BD,BC=AD,求证角C=角D 如图,BC=BD,AC=AD.求证：角C=角D. 已知AD=BC,AC=BD求证角D=角C 电脑PC指的是什么 请问、4.9.10.11.如何算24 电脑的“PC”是指什么? 用11、4、4、13算24 24点4,*9,-7,-13计算24点4、*9、-7、-13计算,用加减乘除计算,列式计算. 如图,已知BD⊥AD,AC⊥BC,D,C为垂足,且AC=BD,求证AD=BC 已知:如图,ac=bd,ad⊥ac,bc⊥bd.求证：ad=bc 下面是食堂采购员某天购物的记帐单.因为不小心将记账单的一角弄脏了,采购员只记得一共买了315千克青菜和冬瓜,且青菜的质量是冬瓜的2.5倍.你能把下面的记账单填写完整吗? 如图,D在△ABC内,求证:AC+BC>AD+BD. 如图.点A,B,C,D在⊙O上,AC⊥BD于点E,过点O作OF⊥BC于F,过点O作OF⊥BC于F,求证AD=2OF自己画的图..可能有点不准..不过也差不多了 风靡世界的中国制造有哪些 一台电视机的原价为A元,降价百分之4后的价格为【