已知三元一次方程组.
(1)求该方程组的解;
(2)若该方程组的解使ax+2y+z<0成立,求整数a的最大值.
抛物线y=3x2先向上平移3个单位,再向左平移2个单位所得的解析式为( )
下列的数中,( )比76大,比79小。
Nowadays the belief has become general ________ sea food and fruits rich in vitamin C should never be eaten at the same meal.