点P(-3,-5)到y轴的距离是( )
A.3
B.4
C.-3
D.5
∵点P(-3,-5)到y轴的距离为其横坐标的绝对值,且|-3|=3,
∴点P(-3,-5)到y轴的距离是3,故选A.
在一般情况下,下列选项中与下图曲线反映的变动关系相一致的是 [ ]
A.X轴为商品需求量 Y轴为商品价格
B.X轴为居民收入增长 Y轴为居民消费增长
C.X轴为人们的收入差距 Y轴为社会总体消费水平
D.X轴为税率 Y轴为财政收入
Sweat damage will occur in a cargo hold containing machinery parts when().
A.the outside air is colder than the cargo
B.the air temperature of the hold is higher than the outside air temperature
C.the dew point of the hold is higher than the temperature of the cargo
D.the dew point of the outside air is lower than the temperature of the cargo