【单选题】若电路中某元件两端的电压u=36sin(314t-π/2)V,电流i=4sin(314t)A,则该元件是( )
【简答题】What is an e–reader? An e–reader is a small computer. It can hold thousands of e–books. So people want to throw away heavy schoolbags and read with small, light e–readers. For example, a US high...
【单选题】若电路中某元件两端的电压u=36sin(314t-π/2)V,电流i=4sin(314t)A,则该元件是( )
【简答题】若电路中某元件两端的电压U=3n(314t-1800)伏,电流i=4sin(314t+1800)安,则该元件是电容。()
【单选题】若电路中某元件两端的电压u=36sin(314t-π/2)V,电流i=4sin(314t)A,则该元件是( )
【单选题】What can a reader learn about in this text?
A.
the life of schoolchildren in Mongolia
B.
the difficulties for blind travellers
C.
the international work of some eye doctors
D.
the best way of studying medicine
【判断题】若电路中某元件两端的电压 u = 36sin(314t - 180 ° )V ,电流 i = 4sin(314t + 180 ° )A ,则该元件是电感元件。
【单选题】关节内有游离体会如何影响关节活动范围( )
【单选题】By using signal words to ______ what may come next, the reader can decide whether he should speed up his reading, slow or pause to make sure what is being read is understood.
【单选题】若电路中某元件两端的电压u=36sin(314t-180)V,电流i=4sin(314t+1800)A,则该元件是()。