The question of __________ English will keep on changing in the future is easy __________ since it is certain that this process will continue.
千锤万凿出深山,烈火焚烧若等闲。粉骨碎身浑不怕,只留清白在人间。
这首诗表面是写____,实际是写____,这种方法叫借物喻人。
已知m=x+1,n=﹣x+2,若规定y= {1+m−n,m≥n1−m+n,m<n ,则y的最小值为( )
在铅球测试中,测量投铅球的距离应选用 ( )