آزمون آنلاین انگلیسی 3 - انگلیسی 3 | آزمون شماره 10256

After her first accident, Sara is quite careful in driving now because ……… .

 The fear of huge destruction made possible by nuclear weapons that could bring an end to the human species has always been a global issue, but scientists who helped develop the atom bomb are searching for ways to make atomic energy a blessing to the world. When atoms are breaking down, hundreds of other substances called radioisotopes are produced. Doctors find some of these useful in studying what goes on in the body. After a small amount has been taken in a pill, doctors can tell by means of a special instrument just where the substance goes in the body. Also, doctors expect that some of the substances will cure diseases. Perhaps your life will be saved by one of the radioisotopes.

Also, scientists are trying to “turn the wheels” in factories, run trains, and drive ships with atomic energies. If they succeed, men will no longer need to try so hard to dig coal or pump oil from the earth for these purposes, for the energy in all the coal and oil in the world is nothing compared with the energy in atoms.

The writer of this passage tries to explain … .

Doctors, teachers, and people in other jobs have to follow a number of rules and values known as professional … .