【单选题】Find the vertex and focus of the parabola.
【简答题】完成下列方程式 :NaOH和HCl反应。
【单选题】这两个有缺陷的正方体,缺少的部分形状相同吗?
【单选题】What does both nature and nurture focus on?
B.
They focus on daily input of knowledge
C.
They focus on the result of the further behavior state
D.
They focus on how human behavior will mature
【单选题】完成反应方程式: HCl + NaOH → ( ) + H 2 O
【多选题】表单通常由多个表单对象组成,表单对象包括( )。
【单选题】Find the vertex and focus of the parabola.