给划线字注音。
____
崛起
归巢
熔点
现定义运算 "★" 对于任意实数a b 都有a★b=a2-3a+b 如:4★5=42-3*4+5 若x★2=6 则x的值为?
已知a=(-3,2),b=(-1,0),向量λa+b与a-2b垂直,则实数λ的值为( )
(____)I don't know.
(____)Where is my pencil?
(____)Li Hua, Where's your pencil?
(____)There it is.
(____)Danny, where is my pencil? Can you see it?(你看见它了吗?)