观察下列顺序排列的等式:
9×0+1=1
9×1+2=11
9×2+3=21
9×3+4=31
9×4+5=41
…
根据数表所反映的规律,猜想:第n个等式(n为正整数)应为( )
Similar experiments________in some European countries by the time we began to work on the project in the 1990s.
春夜
【宋】王安石
金炉香烬漏①声残,剪剪轻风阵阵寒。
春色恼人眠不得,月移花影上栏杆。
【注】①漏:古代计时用的漏壶。