GRE
The ratio of the cost of 1 of the health magazines to the cost of 1 of the news magazines
$$\frac{4}{5}$$
The greatest possible number of lots minus the least possible number of lots
x
20
The number of combinations of $$3m$$ objects taken $$m+9$$ at a time
The number of combinations of $$3m$$ objects taken $$2m-9$$ at a time
3
The length of metal rod M
The length of metal rod R
The distance of PT
The distance of QT
|$$-b^{3}$$|
$$-b^{3}$$
$$||x| – |y||$$
$$|x – y|$$
|$$m$$| - |-$$k$$|
|$$k$$| - |-$$m$$|
25000 +道题目
252本备考书籍