Many people are building the factory in the city because it' not good for the environment.
A:for
B:with
C:without
D:against
在不知不觉之间,我们开始了从儿童向成年的过渡,我们把人生发育的这段时期称为( )
把方程2x+3y﹣1=0改写成含x的式子表示y的形式为( )