()2.Teachersareoftencomparedtocandles.A.burntB.isburningC.burnedD.burning
( ) 2. Teachers are often compared to
candles.
A. burnt B. is burning
C. burned D. burning
设a=(√5-1)/2,求(a^5+a^4-2a^3-a^2-a+2)/a^3-a∵2a=√5-1 2020-04-05 …
一、x=(b^2+c^2-a^2)/2bc,y=(c^2+a^2-b^2)/2ac,z=(a^2+ 2020-06-11 …
已知a+b+c=0,试求a^2/(2a^2+bc)+b^2/(2b^2+ac)+c^2/(2c^2 2020-06-11 …
20.x^2/a^2+y^2/b^2+z^2/c^2=1成立;20.x^2/a^2+y^2/b^2 2020-06-11 …
两数和的平方求值(1)已知a+b=6,a-b=2,求a^2+b^2的值(2)已知a(a-1)-(a 2020-06-14 …
已知a/(a^2+1)=1/2,求a^2/(a^4+1)的值由a/(a^2+1)=1/2,知a≠0 2020-06-14 …
2(a+b)^2-(a+b)2(a-b)^2-a+b(x+y)^2+mx+mya(x-a)(x+y 2020-06-18 …
x2+|x-a|+1,x∈R,的min①当x≥a时,f(x)=x^2+x+1-a=(x+1/2)^ 2020-06-29 …
()2.Teachersareoftencomparedtocandles.A.burntB.is 2020-07-26 …
11.Shehasn’tgotenoughmoneytobuytherings.A.forwhich 2020-10-31 …