怎么简便就怎么算.
(8-3.6)×(1÷4)
解:原式=4.4×0.25
=4×0.25+0.4×0.25
=1+0.1=1.1
∠1=____°
蝗虫的呼吸器官是( )
-- It's hot today, how about going swimming after school?
-- ! Let's ask Tom to go with us.