【简答题】如下表,方程1,方程2,方程3,…,是按一定规律排列的一类方程. 序号 方程 方程的解 1 2x 2 -3x-2=0 2 3x 2 -8x-3=0 x 1 =- 1 3 ,x 2 =3 3 4x 2 -15x-4=0 x 1 =- 1 4 ,x 2 =4 4 5x 2 -24x-5=0 x 1 =- 1 5 ,x 2 =5 … … … (1)解方程1,并将它的解填在表中空白处; (2)方程ax 2...
【判断题】Smoking can exercise jumping ability, Drinking alcohol can build muscle.
【简答题】在方程 x 2 -3x+ 2 x 2 -3x +3=0 中,如果设y=x 2 -3x,那么原方程可化为关于y的整式方程是______.
【单选题】下面对ARP的陈述中,哪一个是正确的____。
B.
它使得管理员物理地管理每台主机或路由器的MAC地址是必需的
【简答题】B: __________________________________. (always/make breakfast for me)
【简答题】Eating too much fatty food, exercising too little and smoking can raise your future risk of heart disease. But there is another factor that can cause your heart problems more immediately: the air you ...
【单选题】在接触器连锁的正反转控制电路中,其联锁触头应该是对方的接触器的( )
【单选题】在方程:3x 2 -5x=0, x 2 +1 3 =x+5 ,7x 2 -6xy+y 2 =0, a x 2 +2x+ x 2 + 5 =0,2 x 2 - 2 x -3 =0,3x 2 -3x=3x 2 -1中必是一元二次方程的有( )