周边眼
参考答案:
沿隧道周边布置的炮眼称为周边眼。
I jumped on the train, but it __________ ready.[ ]
A. aren't
B. wasn't
C. isn't
已知一次函数y=kx+b的图象经过点P(2,-1)与点Q(-1,5),则当y的值增加1时,x的值将______.