____ with serious financial crisis, some international companies have to slow down their investment all over the world.

A．Faced

B．Facing

C．To face

D．Having faced

使用瞳距仪时一定要紧贴被检者的前额和鼻梁处，以（）。

A、减小瞳距误差

B、减小棱镜度误差

C、减小瞳高误差

D、减小顶焦度误差