A:Frank's father was hardworking and very responsible.
B:Frank's father drove him to school everyday when he was 12.
C:Frank regretted refusing his father's kiss very much.
D:Frank didn't think the good-bye kiss an embarrassment anymore.
如图,已知AB∥CD∥EF,∠ABC=50°,∠CEF=150°,则∠BCE的值为( ).
下列不属于排泄的是( )
在生活中经常需要估测一些物理量,下列估测比较接近实际的是( )