The charging system had two goals:（ ） A: To monitor the batteries and avoid damaging them during the charging process. B: To provide power for accessories. C: To pump electricity into the batteries as quickly as the batteries will allow.
The charging system had two goals:（ ） A: To monitor the batteries and avoid damaging them during the charging process. B: To provide power for accessories. C: To pump electricity into the batteries as quickly as the batteries will allow.
The controller of an electric car takes power from the batteries and delivers it to the motor.( )
The controller of an electric car takes power from the batteries and delivers it to the motor.( )
Dispose of batteries properly. Do not throw them into fire or＿ high temperature.
Dispose of batteries properly. Do not throw them into fire or＿ high temperature.
A battery pack contains many batteries, wired in series to create hundreds volts.（ ）
A battery pack contains many batteries, wired in series to create hundreds volts.（ ）
中国大学MOOC: This, combined with ultra-fast charging and longer-lasting batteries, means the drones of 2018 _____________________________.
中国大学MOOC: This, combined with ultra-fast charging and longer-lasting batteries, means the drones of 2018 _____________________________.
Which one is a nature-friendly behavior? A: over use of plastic bags. B: using public transportation. C: batteries are thrown away at random. D: abusive use of exhaustible resources
Which one is a nature-friendly behavior? A: over use of plastic bags. B: using public transportation. C: batteries are thrown away at random. D: abusive use of exhaustible resources
Which one is a nature-friendly behavior? A: over use of plastic bags. B: using public transportation. C: batteries are thrown away at random. D: abusive use of exhaustible resources
Which one is a nature-friendly behavior? A: over use of plastic bags. B: using public transportation. C: batteries are thrown away at random. D: abusive use of exhaustible resources
Fill in the blanks with the words given below. Change the form where necessary. internal ditch fabulous renovate plaster amateur blunder instinct Unlike the Satellite, it has no ______ battery, though it will accept external batteries made for the iPad.
Fill in the blanks with the words given below. Change the form where necessary. internal ditch fabulous renovate plaster amateur blunder instinct Unlike the Satellite, it has no ______ battery, though it will accept external batteries made for the iPad.
There are two identical batteries in series, which statement is true?( ) A: The total voltage equals the sum of the voltages of each battery. B: The total voltage equals any battery voltage. C: The total voltage equals half of one battery voltage
There are two identical batteries in series, which statement is true?( ) A: The total voltage equals the sum of the voltages of each battery. B: The total voltage equals any battery voltage. C: The total voltage equals half of one battery voltage
A fuel cell is a device that produces electricity from chemical fuels, in just one step. Unlike batteries, fuel cells don’t run down or need recharging. As long as there is a constant source of fuel and oxygen, fuel cells will continue to generate power.
A fuel cell is a device that produces electricity from chemical fuels, in just one step. Unlike batteries, fuel cells don’t run down or need recharging. As long as there is a constant source of fuel and oxygen, fuel cells will continue to generate power.