Hello, I'm a doctor. I work at night. I go to bed at _______.( )
A:11:00 p.m.
B:10 o'clock at night
C: 5 o'clock in the morning
D: 10: 30 p.m.
have(第三人称单数) ____
⊙O1、⊙O2、⊙O3两两外切,且半径分别为2cm、3cm、10cm,则△O1O2O3 的形状是( )