为了避免火灾,汽车加油站采取的下列措施中不合理的是( )
A:严禁烟火
B:禁止使用手机
C:架高顶棚加强通风
D:降低燃料的着火点
See, your computer has broken down again! It doesn't ______ sense to buy the cheapest brand of computer just to save a few dollars.
若代数式 x+1(x−3)2 有意义,则实数x的取值范围是( )
下列行为属于负责任的表现的是 ( )