GRE
$$n$$
$$39$$
$$3$$
The number of permutations in which all the vowels are next to each other
The number of permutations in which all the consonants are next to each other
n
9
The range of the numbers a, b, c, d, e, and f
The range of the numbers $$a^{2}$$, $$b^{2}$$, $$c^{2}$$, $$d^{2}$$, $$e^{2}$$ and $$f^{2}$$
x
y
25000 +道题目
6本备考书籍