【其它】题目.docx Photo (7).jpg Photo (1).jpg Photo (2).jpg Photo (3).jpg Photo (4).jpg Photo (5).jpg Photo (6).jpg Photo (7).jpg Photo (8).jpg Photo (9).jpg Photo (10).jpg Photo (11).jpg Photo (12).jpg 相册主题.pptx

The sun’s rays falling upon photo-electric cells, the whole apparatus will automatically go into operation.

下面属性中，（ ）是保存上传文件名为photo的文件类型。 A: $_FILES["photo"]["name"] B: $_FILES["photo"]["size"] C: $_FILES["photo"]["tmp_name"] D: $_FILES["photo"]["type"]

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

A、photo

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