根据小短文把教室的东西装饰一下，涂上正确的颜色，并根据图片把短文中所缺的数字填上。

      Hello! This is my classroom. It's very nice and big. The door is yellow. The windows are green. The desks

are blue. The teacher's desk is red. We have _____________ fans and _____________ lights. My seat is near

the door. I like my classroom.

在车削外圆时，若进给量和切削深度一定，则主偏角κ_r越大，切削厚度就越大，但切削宽度就越小。( )