A:减小
B:增大
C:先减小后增大
D:先增大后减小
制约环境人口容量的首要因素是( )
已知一次函数y=kx+b的图象经过点(2,3),(-1,-3),那么这个一次函数的解析式为( )
______ awful day it was that day! We experienced _______ unusual weather in London.