The phrase "a marks" is not correct in written English.
It is typically used incorrectly as "marks" is a plural noun and should not be preceded by the article "a."
Example: "He received a mark for his excellent performance on the test."
Alternatives: "a grade" or "a score."
How many "A" marks does this teacher give? is usually the first question asked of Pick-a-Prof.
Arrow "A" marks a shallow hole and "B" a deep hole.
The first is a mutant allele-specific forward primer JAK2_Ex14_Mut_F: 5′-CTTACTCTCGTCTCCACAGA A-3′ (where the bold "A" marks the position of the V617F nucleotide substitution).
The (black) cross in a marks the best-fit central value.
Yellow dashed line in (a) marks the area of photoconversion using a laser of 405 nm.
Preston should have had a John Lewis, a Marks & Spencer – it would have been completely different.
Convinced ratings agencies were assigning triple-A marks to junky paper, he wrote a business plan in 1994 to rate mortgage-backed securities.
Generally, examinations that used a marks-based system tended to emphasize lower-order thinking, with a greater distribution of marks allocated for lower-order thinking questions.
It won't do to have some other person get your A+ marks while you get a C, all because of a name mix-up.
Astronomers think that Sgr A* marks the dark heart of the Milky Way: a supermassive black hole weighing as much as 4 million suns.
The compact radio/IR/X-ray source Sagittarius A* marks the location of the Milky Way's central supermassive black hole.
