Imagine a mass of floating waste is two times the size of the state of Texas. Texas has a land area of more than 678,000 square kilometers. So it might be difficult to imagine anything twice as big.
Competition. It’s a simple word, yet a very complex word that covers many angles when it comes to how gasoline prices are determined. It seems so easy to explain, but don’t let that trick you
_______ that Marie was able to set up new branches elsewhere． A．So successful her business was B．So successful was her business20090908 C．Such successful busine
画出函数y=f(x)的图像，如图所示，
得x2＋x＋m-1=0，∵Δ=1-4(m-1)=5-4m，由Δ=0，得m=
，
，即(-1,
).