1. that we
get
it from the conversion (转化) of other sources of energy, like coal, oil, nuclear power and other natural sources, which are called primary sources. The energy we use to make electricity can be neither renewable nor non-renewable, but the electricity itself is neither renewable nor non-renewable.
2. Electricity is a basic part of nature and it is one of our most
widely
used forms of energy. Many cities and towns were built along waterfalls that turned
large
water wheels to work. Thomas Edison helped
change
everyone's life. He perfected his invention, the electric light bulb. Although electricity is very important in our daily life, most of us hardly stop to think what life would be like without electricity. Every day, we use electricity to do many jobs for us; from lighting and heating to powering our televisions, computers and power. Electricity is a useful and
clean
form of energy used in our daily applications.
6. 1. ______ 2. ______ 3. ______ 4. ______ 5. ______ 6. ______
