在衡量通货膨胀时，最常用的指标是生产者物价指数。()
参考答案：错
解析：最常用的指标是消费者物价指数。
Mr. Black is very happybecause the clothes made in his factory have never been _____.[ ]
A. popular
B. more popular
C. most popular
D. the most popular
（）供水方式是实现压力均衡的最佳供水方式。
A.树状管网
B.环状管网
C.分区
D.分压
