教材变式·P100T3先去括号,再合并同类项(1) (3x^2+4-5x^3)-(x^3-3+3x^2) ;(2) (3x^2-xy-2y^2)-2(x^2+xy-2y^2) ;(3)-3m+2(m-1)-(2m-4);(4) 1/5(15n-5)-0.2(-5n+10) ;(5) 2x-[2(x+3y)-3(x-2y)] .
解:(1)3a(2a-1) =6a^2-3a 解:(2)-x(3x^2-2x-2) =-3x^3+2x^2+2x 解:(3)(x^2-2y)(x^2y)^2 =x^2* x^4y^2+(-2y)* x^4y^2 =x^6y^2-2x^4y^3 解:(4)-2xy(x^2-3y^2)-3xy(2x^2-2y^2) =-2xy* x^2+(-2xy)* (-3y^2)+(-3xy)* 2x^2+(-3xy)...
1、宇舶大爆炸复刻精仿品质价格是300到800元,做工有点像,地摊货,这类手表多为地摊货一眼假。2、宇舶大爆炸复刻精仿品质价格是1200到2000元,比较像,高端货,外观方面已经比较像了,表壳也是用的精钢材质了。3、宇舶大爆炸复刻顶级精仿品质价格是2000至4500元不等。顶级精仿表。这类手表是代表精仿表行业最高...
目的关于不同剂型的二甲双胍对2型糖尿病的治疗效果的研究。方法本次研究选取我院2013年9月至2015年11月期间收治的128例2型糖尿病患者作为研究对象。对照组2型糖尿病患... 张燕 - 《世界最新医学信息文摘》 被引量: 0发表: 2016年 探讨二甲双胍治疗初诊2型糖尿病的临床效果 目的:探讨二甲双胍治疗初诊2型糖尿...
Cooling apparatus for tubular plastics film extruded from a film blow head includes an outer cooling ring which surrounds the extruded tubular film and defines an annular nozzle gap with a blowing direction substantially parallel to the wall of the tubular film. Near the end of a cooling section...
(教材P100T3变式)化简: 22b-3a-32a-3b; 23x-y+2x-3y-32x-y; 3ab-b2-2ab+3a2-2ab-6ab-b2; 3x2y-6xy
32ab2-2a2b⋅2ab2;3a2a2-9a+3-4a2a-1.相关知识点: 试题来源: 解析 解:-2x2y⋅3xyz-2y2z+1 =-6x3y2z+4x2y3z-2x2y., 32ab2-2a2b⋅2ab2 =3a2b4-4a3b3., 3a2a2-9a+3-4a2a-1 =6a3-27a2+9a-8a2+4a =6a3-35a2+13a.反馈 收藏 ...
(教材P100T1变式)下列各式从左到右的变形,正确的有( )①-a-b+c=-a+b-c;②x-2y-z=x-2y+z;③2x-y-3a+b=2x-y-3a+3
Obstacles facing chemotherapeutic drugs for cancers led scientists to load Gemcitabine (GEM) into nanocarriers like liposomes, known for their nontoxicity profile and targeting capacity. The liposomal nanostructures containing GEM were coated with Fucoidan (FU) due to its anti-tumor properties by targetin...
Review of ‘Philosophy in a New Century’ by John Searle (2008) (review revised 2019) 来自 钛学术 喜欢 0 阅读量: 39 作者: M Starks 摘要: Before commenting on the book, I offer comments on Wittgenstein and Searle and the logical structure of rationality. The essays here are ...