【简答题】电场内两点间的电位差叫( ),用符号( )表示。
【简答题】什么叫电位?什么叫电位差?什么叫电压?电位与电压是什么关系?电压的方向是怎样的规定的?
【单选题】All cultures have some system of measuring duration, or keeping time, but in Western industrialized societies, we keep track of time in what seems to other peoples almost an obsessive fashion. We view...
A.
their way of living depends greatly on perseverance and repetition
B.
they think it necessary to invent their own perception of time
C.
their language does not contain words referring to motion
D.
they think everything should proceed in a linear way
【单选题】电路中之所以有电流流动是由于电源两端的电位差造成的,这个电位差叫( )。
【判断题】浙北区块可以游水乡,谒佛国,亦可寻觅唐诗之路。