My sister is only two years old, and I have to _____ her on Sunday.
A:look for
B:look after
C:look like
D:look at
—____ it a cat?
—No. It's a ____.
下列命题:
①两点确定一条直线;②两点之间,线段最短;③对顶角相等;④内错角相等;
其中真命题的个数是( )
如图所示,电动小车沿斜面从A匀速运动到B,在运动过程中( )
“咛”组词可以组“丁咛”。( )