There are three types of transmission:manual,automatic and electric.

You have to operate this sewing-machine ________— it is not electric. A: additionally B: specially C: inherently D: manually

Nowadays, such electric ______ as electric cookers, electric heaters, electric ovens are getting into ordinary homes. A: instruments B: appliances C: equipment D: apparatuses

Both electric field E and electric potential V can describe the characteristics of a field. If the electric potential at a certain point is zero, the electric field at that point has to be zero.

BEV/EV (Battery Electric Vehicle/ Electric Vehicle):____

Electric heaters have the electric energy _____________ (transform) into heart.

This heater consumes _______________ that one does. A: electric power twice as great as B: greater twice electric powe C: twice as great electric power as D: twice greater electric powe

4-3。What is the working principle for LED？（ ） A: convert electric to light B: convert light to electric C: convert electric to heat

(10分)This heater consumes _______________ that one does. A: greater twice electric power B: electric power twice as great as C: twice as great electric power as D: twice greater electric power

electric