— What are you going to do if it______ tomorrow?
—I haven't thought about it.
A:doesn't raining
B:won't rain
C:doesn't rain
D:isn't raining
(Ⅰ)求角C的大小;
(Ⅱ)求cosA+cosB的最大值.
判断对错:轴对称图形也是中心对称图形。
如图,已知DE由线段AB平移得到的,且AB=DC=4cm,EC=3cm,则△DCE的周长是( )