下图表示“制作洋葱鳞片叶表皮细胞临时装片”实验的部分操作步骤,按照实验操作过程,将①一④实验步骤进行排序,正确的是
A:①—②—③—④
B:④—③—1--②
C:①—②—④—③
D:③一④—②—①
实行依法治国的重要前提是 ()
—Dad, I'll be in the final singing competition tomorrow.
—Be careful not to get a sore throat and your voice.