sqrt (2)pi -|||-C. dfrac (sqrt {2pi )}(4)-|||-D. dfrac (sqrt {2pi )}(8)
[ 0,dfrac (pi )(2)] D. [ -sqrt (dfrac {pi )(2)},0]
(int )_(-pi )^pi sqrt ({pi )^2-(x)^2}dx= )(int )_(-pi )^pi sqrt ({pi )^2-(x)^2}d
dfrac (2pi )(sqrt {3)} D. dfrac (pi )(6)
dfrac (2pi )(sqrt {3)}-|||-D. dfrac (pi )(6)
dfrac (1)(2)pi (R)^2E-|||-D. sqrt (2)(R)^2E-|||-E. dfrac (pi {R)^2E}(sqrt {2)}
平均自由程lambda =1div sqrt (2)pi (d)^2n=kJdiv sqrt (2)pi (d)^2p ,平均碰撞频率 =sqrt (2)pi
sqrt (2)BIa-|||-C. dfrac (pi )(2)BIa-|||-D.BIa
下列复数① sqrt[4](6)(cos (pi)/(8)+i sin (pi)/(8));② sqrt[4](6)(cos (pi)/(8)-i sin (p
sqrt (2)-|||-C. sqrt (34)-|||-○ D. sqrt (2)