题目

A.10:15 B.10:30 C.10:50 答案：【答案】B【解析】【原文】The meeting will start at half past ten. Please attend it on time.19．如图，ABCD-A1B1C1D1为正方体，下面结论错误 的是（　　）A．异面直线AC1与CB所成的角为45°B．BD∥平面CB1D1C．平面A1BD∥平面CB1D1D．异面直线AD与CB1所成的角为45°