喷嘴是决定降尘效果好坏的主要部件,它的形式有圆形、伞形、气球形等。()
参考答案:错
一个数的个位上是8,十分位是6,百分位上是3,这个数写作______,读作______.
Some students often listen to music ___ ___ classes to refresh themselves.[ ]
A. between
B. among
C. over
D. during