A:Who is that little girl?
B:Who is that little boy?
There was not a ____ in my old school.
“所谓税收就是不付出任何报酬而向居民取得的东西.”这句话是在强调税收的 特征。( )
一物体由静止沿光滑斜面匀加速下滑距离为L时,速度为v,当它的速度是v2时,它沿斜面下滑的距离是( )
The two cities have reached an _________ to develop science and technology.