At school, we are taught _______ knowledge _____how to behave well.
A:neither, or
B:either, or
C:not only, but also
D:not, but
用除法表示下面的分数
25 =____ ÷ ____
在一个边长为10m的正六边形地面,用边长为50cm的正三角形瓷砖铺满,则需这样的瓷砖____块.
如图所示,三支温度计的液柱示数分别应该是(a)____(b)____ (c)____
The elephant wasn't ____ ____ ____ ____ through the door.