《产品质量法》所称的产品是指经过加工、制作，（）的产品。
A.使用
B.运输
C.储存
D.用于销售
参考答案：D
排序。
( ) Open the shutter.
( ) Look at the view finder.
( ) Press the button.
( ) Put in the film.
( ) Point at objects or people.
( ) Close the shutter and put the camera away.
( ) Put in the battery.
( ) Tell everyone to say, "Cheese!"
扣件式钢管脚手架通常使用Φ48.3mm钢管，其壁厚为（）mm。
A.2.5
B.3
C.3.5
D.4
