如图所示，在粗糙水平地面上放着一个截面为四分之一圆弧的柱状物体A，A的左端紧靠竖直墙，A与竖直墙之间放一光滑圆球B，整个装置处于静止状态，若把A向右移动少许后，它们仍处于静止状态，则（   ）

Martin: What do you want to be when you grow up, Jiamin?

Jiamin: I want to be a fireman (消防员). I think the fireman is cool.

Martin: And you, Lily?

Lily: I like children. I want to be a teacher. What about you, Martin?

Martin: My father is a police officer. He can stop bad people. So I want to be a police officer.

Jiamin: Police officer can help people. Your father is great, Martin.

Martin: Thanks. Look, Miss Wang is hard-working. I think the teacher is great, too.

核能是人类开发和利用的一种有前途的新能源，下列说法不正确的是（　　）

3g碳和8g氧气反应生成11g二氧化碳，则6g碳和8g氧气在点燃的条件下完全反应生成CO₂，生成CO₂的质量为（    ）