1×2×3×4×…×2007×2008的运算结果末尾有多少个连续的0.( )
A:100
B:300
C:500
D:700
I'm working____ ____ ____ ____ ?
Tom is interested in these____(剧本).
— _________ are you going to do tomorrow?
— I'm going to have a piano lessons.
实验室利用如图实验装置进行有关化学实验,回答下列问题: