They respectively represent five learning stages of "browsing, asking questions, reading, retelling and reviewing". This reading method was put forward by Robinson of the University of Iowa. This method was highly praised after it was created. The main point is to pay special attention to the preface, executive summary, table of contents, titles, drawings, tables, photos, notes, references and indexes in the text.
:SQ
SQ is an English abbreviation, which can mean many things. "SQ" can refer to emotional intelligence, excellent sound quality, dead circle, song title, network term "private Q", square root in mathematics and so on. SQ can also be English Super Quality, which means super quality.
There are many music apps on mobile phones, but the sound quality of a song is often divided into standard, HQ and SQ. HQ is the abbreviation of English High Quality, which means high quality; SQ is English Super Quality, which means super quality, that is, a kind of music that is almost lossless.
For those without HQ and SQ, it is a standard music type and belongs to lossy compression. By reducing the audio sampling frequency and bit rate, the output audio file will be smaller than the original file, so the quality of the song is average.
Notes on sound quality:
HQ and SQ, high-quality music, are similar to the principle of lossless compression: on the premise of 100% retaining all the data of the original file, the volume of the audio file can be reduced, and the compressed audio file can reach the same size and the same bit rate as the source file after restoration.
Because of the different information content between SQ and HQ, the number of tracks and the degree of stereoscopic impression of SQ are far stronger than that of HQ. When listening to large-scale compilation, SQ can enhance the sound of subtle hidden instruments and remove noise, which is better than HQ, so the sound density is different and the sound field is different.