在培养细菌的培养基上长出了青霉,细菌与青霉之间的关系是
A:寄生
B:互利共生
C:竞争
D:种内斗争
.下列对二十国集团中唯一一个国际组织——欧盟的叙述,正确的是( )
--- What do you think of his idea?
--- It sounds but it just might work.