【判断题】如果三效催化转化器工作不正常,下游氧传感器给出电压信号的频率就会升高。
【判断题】遮栏应采用干燥的绝缘材料制成,不能用金属材料制作。( )
【单选题】In general, elasticity is a measure of
A.
the extent to which advances in technology are adopted by producers.
B.
the extent to which a market is competitive.
C.
how fast the price of a good responds to a shift of the supply curve or demand curve.
D.
how much buyers and sellers respond to changes in market conditions.
【判断题】如果三效催化转化器工作不正常,下游氧传感器给出电压信号的频率就会降低。
【单选题】二元凝聚系统的相图中,相界线上的自由度数为 。
【单选题】In general, elasticity is a measure of
A.
a. the extent to which advances in technology are adopted by producers.
B.
b. the extent to which a market is competitive.
C.
c. how fast the price of a good responds to a shift of the supply curve or demand curve.
D.
d. how much buyers and sellers respond to changes in market conditions.