The admission line of colleges and universities is different every year, mainly because of the enrollment plan and the number of applicants in that year and the difficulty of the college entrance examination questions in that year.

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The college entrance examination admission score line is also called provincial control line or batch line. Each province has a different name and the same meaning. The so-called college entrance examination admission line refers to a fractional line that candidates must pass if they want to go to a number of universities. Generally speaking, the admission line of a university is called the key line; The admission lines of two universities are called two lines; The admission lines of three universities are called three lines or undergraduate lines; The admission line of higher vocational colleges is called the college entrance line.