0.8x－6=42

x=____

如图是和谐号穿越北京居庸关花海的情景，被誉为是开往春天的列车．车内的乘客们欣赏着车窗外的美景，一簇簇鲜花往后“退”去，带给人们“美到窒息”的享受．乘客感到“花海”在运动，是以下列哪个作为参照物？（　　）

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根据短文内容, 判断正误。

    When we play a game with our classmates or friends, we usually need to make some rules first. I think it's very important to have rules.

There are lots of rules in my school. We must get to school on time. We have to wear the school uniform on Mondays and Thursdays. We can't run in the hallways. We can't fight. I think it's very good to have rules at school.

    We must follow traffic (交通) rules. We can go at green lights (灯) and have to stop at red lights. The traffic rules make us safe (安全的).  

When we take a car and sit next to the driver, we must wear the safety belts (安全带). Also, children must sit on the safety seats.