电源端电压U、电流I、通电时间t,输出能量的大小等于()。
A.UI
B.UIt
C.I2R
D.UI
参考答案:B
It is uncertain side effect the medicine will bring ?about?,although about two thousand
patients have taken it. [ ]
A. that
B. what
C. how
D. whether
在TD-SCDMA室内分布系统信号占主导,EC/IO值比其他小区的EC/IO值高()db以上。
A.3
B.5
C.7
D.10