Please call me when you _______ Beijing.
A:arrive
B:get
C:arrive at
D:reach
若反比例函数y= k-3x的图象经过点(1,-2),则k的值为( )
关于半球的划分,说法错误的是( )
(Ⅰ)证明:PC⊥平面BED;
(Ⅱ)设二面角A﹣PB﹣C为90°,求PD与平面PBC所成角的大小.