The water quality of the Songhua River (Northeast China) was of concern, especially in the 1980s and early 1990s, and there were many studies carried out on this aspect. However, only one or several independent water quality indices were used to consider the effects of pollutants on the water quality, for instance, heavy metal and toxic organic pollutants. The combined effects of multiple indices were seldom studied. In this article, based on the environmental monitoring data, the water quality of the Songhua River was analyzed using factor analysis, which comprehensively considered six indices of water quality of each monitoring section.

Tear gas floated into the Hilton, up the air vents, and into the suite of the vice president, who was preparing his acceptance speech. On the street, chanting: Sieg Heil, Sieg Heil, Sieg Heil, and The Whole World Is Watching. The world was watching, or at least an estimated 90 million Americans […].

They ran to the Waterloo, and my own little knot of farewellers were enough to warrant the reading of the riot act before their arrival.

The protesters became so noisy that they were finally ousted from the meeting.