A:胶棉
B:人造丝
C:阿胶
D:人造棉
下列生物中,不属于自养型生物 的是( )
将正三角形、正四边形、正五边形按如图所示的位置摆放.如果∠3=32°,那么∠1+∠2= ____度.
John was dismissed last week because of his ________attitude towards his job. ( )