你可能感兴趣的试题
用a趁热过滤提纯苯甲酸 用b制备并检验乙烯 用c除去乙醇中的水 用d分离硝基苯与水
10 sin (314t+53.1 °) 10 sin (314t+36.9 °) 10sin (314t+53.1 °) 10sin (314t+36.9 °)
u=380 2 sin (314t-1200 )V u=3803 sin(314t-1200 )V u=380 2 sin (314t+1200 )V u=3803 sin(314t+1200 )V
i=141sin314t i=7.07sin(314t-90o) i=10sin314t I=5sin314t
(31-2)2 (3-21)2 (3×-2×)2 (3×1-2×)2
Uu=311sin314t Uu=311sin(314t-300) Vu=311sin(314t-1500) Vu=311sin(314t-1500) Wu=311sin(314t+900)
int f=314.; int a=012; int i=189; int d=0x123;
2sin314t 2sin(314t+30) 2sin(314t-30) 2sin(314t+60)