Gaokao Math Practice Question
已如 $A, B, C$ 是半径为 1 的球 $O$ 的球面上的三个点, 且 $A C \perp B C, A C=B C=1$, 则三棱雉 $O-A B C$ 的体积为 （$\quad$)
- A.$\frac{\sqrt{2}}{12}$
- B.$\frac{\sqrt{3}}{12}$
- C.$\frac{\sqrt{2}}{4}$
- D.$\frac{\sqrt{3}}{4}$
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