6357÷34,商的最高位在____位上,商是____位数.
Season
Sports
Leaving Time
How long
How to go there
In____
To ____and row
In the first week in ____
A ____
By ____
以下现象属于增大压强的是( )
图中标出了制成铅笔的几种材料,通常条件下属于绝缘体的是( )