-- Such beautiful flowers! I can't decide _______ for my mum.
-- For Mother's Day, it can't be better to take some carnations (康乃馨).
A:to choose which
B:how to choose
C:which to choose
D:when to choose
“朦朦胧胧张眼一瞧,黑暗里突然突出一线红。这是什么?——原来是北极下来的新潮,由近东卷到远东”,这是民国七年刘大白写的《红色中华》中的几句诗,它的创作背景是( )
如图所示,以下说法错误的是
如图,已知直线a∥b,a、b之间的距离为4cm.A、B是直线a上的两个定点,C、D是直线b上的两个动点(点C在点D的左侧),且AB=CD=10cm,连接AC、BD、BC,将△ABC沿BC翻折得△A1BC.
He is a kind doctor, and these years letters of thanks have been f____ in.