The sky was blue everything was beautiful.[ ]
A.and
B.but
C.or
D.so
答案:B
在日常生活中,不作调味品的物质是( )
A.食盐
B.蔗糖
C.白醋
D.自来水
先学习的信息对后学习的信息的干扰,叫做().