The electric wires in a house____with some kind of insulation.
The solar cell can _____ the energy of sunlight into electric energy.
There was a blackout last night and the electric lamps went out, so we had to resort___candles to light the room to study.
____ are chemical messengers in the transmission of impulses that trigger the receptors on the next nerve cell’s dendrites to produce a new electrical current.
The cost of electricity is likely to be seriously ________ by the rise in gas prices.
From his studies of electricity, Franklin ____________.
Some of the most efficient refrigerators_________ 70 percent less electricity than traditional models.
Electric goods fall ______the scope of our business activities．
The ___________(转变,改造)of nuclear radiation directly into electricity was an exciting possibility that was being explored in 1950s.
Do you know how to ___________________electricity ?
They are going to have the serviceman ____ an electric fan in the office tomorrow.
We’ve all heard of Thomas Edison, __________ who invented the electric light and many
We call water, electricity and sewer______.
He asked me_____that electric fan.
Besides the electrons, an atom also contains positive electrical particles______total charge must be equal to that of the electrons.
There is an electric fire. Get the ________ extinguisher.
The ______ blanket can make you feel very warm while sleeping. （electricity)
Where do cars get their energy from？ For most cars, the answer is petrol. 1_____some cars use electricity. These cars have 2 _____motors that get their power from large batteries. In 3___, there are even cars that have 4_____ an electric motor and a petrol motor. These types of cars are 5_____ hybrid (混合) cars.
Plastics are the best insulator of electricity, rubber______it closely.
Ivan: I brought you the new Groove People CD.Dale: What good is a CD if I haven't got a CD player？ Ivan: I can bring you a CD player. Dale: What good is a CD player ifI don't even have electricity？ Ivan: ______ Dale: What good is calling the Electric Company if I haven't got a house？
It is well known tht Toms Edison ______ the electric lmp.discoveredB．foundC．developedIt is well known tht Toms Edison ______ the electric lmp.discovered B．found C．developed D．invented
Directions: Choose the appropriate words or expressions in the word bank to complete the passage. Word bank: ins and outs; appreciate; set about; organic; go out; self-sufficient; haul; generate; adjustment; taken for granted; If you want to know all the ________ of living green, then you should visit Backsbottom Farm. It is run by Rod and Jane, who have tried to be as ________ as possible. They use a horse to ________ the logs they cut from their woods. The fields are nourished by ________ waste from the horse and their other animals rather than chemicals. They rely on a windmill to ________ their electricity and when the wind slows down the lights ________ and they have to ________ looking for the candles. Jane, who was brought up in a home where constant electric power was ________, admits it was hard to make the ________ when they first arrived at the farm, but adds that overall they really ________ their new way of life.
The plant_____electricity for the entire city.
44、一带电粒子与磁感应线成任意角度射入匀强磁场，则它作___运动； If the electric particle and the magnetic induction line are injected into the uniform magnetic field at any Angle, it will do ___ motion.
