[判断题]压滤机工要经常与浮选工序联系，了解给矿量的多少，正确控制压矿量，确保浓密机正常工作。

We show an amazing tolerance for a form of pollution that is a growing problem: noise. Airplane traffic is increasing by five percent a year. Urban noise is doubling every ten years. By air, land and sea, we are facing an onslaught of noise that is threatening our ability to live in this world.
We have granted ourselves the right to make noise. But what about our responsibilities Have we developed a sense of acoustic responsibility
The evidence suggests that we have not. Many people seem to believe they have an unlimited right to make noise with cars and motorbikes, and with loud music at home and in the street. In some countries measures have been taken to force people to make less noise. In Britain, for example, a law has been passed preventing people from disturbing their neighbors with music at night.
It is widely accepted that we should deal with our rubbish in a responsible way. Noise is in reality a particularly insidious (潜在的) form of rubbish. It d
A. is four times higher every ten years
B. is four times lower every two years
C. is twice as high now than ten years ago
D. is twice as high now than two years ago

A.夜间
B.B.电缆隧道
C.C.事故或恶劣天气
D.D.偏僻山区