放在传送带上的货物,与传送带一起运动,那么货物相对传送带是____的,相对于地面是____的。
已知等差数列{an}.满足:an+1>an(n∈N*),a1=1,该数列的前三项分别加上1,1,3后成等比数列,an+2log2bn=﹣1.
分别求数列{an},{bn}的通项公式.
How kind you are! You always do what you can __________ others.
I still remember my happy childhood when my mother ____ me to Disneyland at weekends.