exercise可数吗exercise表示作业时可不可数?do Maths exercise还是do Maths exercises?

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exercise可数吗exercise表示作业时可不可数?doMathsexercise还是doMathsexercises?exercise可数吗exercise表示作业时可不可数?doMathse

exercise可数吗exercise表示作业时可不可数?do Maths exercise还是do Maths exercises?
exercise可数吗
exercise表示作业时可不可数?do Maths exercise还是do Maths exercises?

exercise可数吗exercise表示作业时可不可数?do Maths exercise还是do Maths exercises?
(智力的)运用;(尤指)锻炼运动时不可数,比如说:The doctor advised him to take more exercise.(发音,体操,保健,深呼吸,钢琴等)练习,训练时可数,比如说:The teacher set her class a mathematics exercise for homework.还有(部队等的)操练,演习也是可数的,比如说:military exercises军事操练

加s

不用加

是 do maths exercises

exercise 做锻炼,运动的意思时事不可数名词
练习题,早操可数