在完全竞争市场上,行业市场的均衡价格是不会改变的。
查看答案
Americans eat ________ vegetables per person today as they did in 1910.
A. twice
B. as twice as many
C. twice as many as
D. twice as many
Paper produced every year is _________ the world's production of vehicles.
A. the three weight of
B. three times the weight of
C. as three times heavy as
D. three times as heavier as
The big stone is _________ that one.
A. three times heavier
B. three times as heavy of
C. three times as heavier as
D. three times as heavy as
This country is four ________ of that one.
A. times the size
B. times as big
C. times the size as
D. times bigger than
微信支付 
支付宝支付