【单选题】在调节望远镜光轴与分光计主轴相互正交的过程中,我们使用了减半逐步逼近方法,这种逼近方法是调节哪两个螺丝来减半逼近的?
C.
载物台的 高低调节螺丝与平行光管的俯仰 调节螺丝
【简答题】当 x → 0时, x - sin x 是关于 x 的 阶无穷小。
【简答题】当 x →0 时, x -sin x 是 x 的 阶无穷小。
【判断题】A price floor set above the equilibrium price is binding.
【单选题】当 x → 0 时,函数 sin x 是 x 的( )
【单选题】当x→0时,x-sin x是x的( )。
【判断题】To be binding, a price floor must be set above the equilibrium price.
【判断题】To be binding, a price floor must be set below the equilibrium price.
【判断题】A price floor set above the equilibrium price is not binding.
【单选题】A price floor
A.
changes the equilibrium price if it is imposed in black markets.
B.
changes the price and quantity if it is set below the equilibrium price.
C.
changes the price and quantity if it is set above the equilibrium price.
D.
does not create a black market if it is set above the equilibrium price.
E.
changes the price and quantity only if it equals the equilibrium price.