[ sqrt (3),2] -|||-C. [ -2,-sqrt (3)] D. [ -2,-sqrt (3)] cup [ sqrt (3),2]

-3sqrt (2) C. -2sqrt (3) D. -1

sqrt (2) C. sqrt (3) D.2

sqrt (dfrac {3g)(l)}-|||-C. sqrt (dfrac {3g)(2)}-|||-D. sqrt (dfrac {8)(3)}

已知x=(sqrt(3)-sqrt(2))/(sqrt(3)+sqrt(2))，y=(sqrt(3)+sqrt(2))/(sqrt(3)-sqrt(2))，求3

sqrt (2)-|||-C. sqrt (34)-|||-○ D. sqrt (2)

sqrt (2)pi :2 C. sqrt (2)pi :4 D. sqrt (2)pi :8

=2sqrt (2) D. Delta PAC 的面积为 sqrt (3)

dfrac (1)(2)-|||-C .dfrac (sqrt {2)}(2)-|||-D .dfrac (sqrt {3)}(2)

已知 alpha_1 = ((1)/(sqrt(3)), (1)/(sqrt(3)), (1)/(sqrt(3)) ), alpha_2 = (-(1)/

[ -sqrt (2),sqrt (2)] D. [ -sqrt (2),0]