"The big economic difference between nuclear and fossil-fuelled power stations is that nuclear reactors are more expensive to build and decommission, but cheaper to sun. So disputes over the relative efficiency of the two systems revolve not just around prices of coal and uranium today and tomorrow, but also around the way in which future income should be compared with current income."

　　1. The main difference between nuclear and fossil-fuelled power stations is an economic one.

　　A.　TRUE

　　B.　UNTRUE

　　C. CANNOT SAY

　　2. The price of coal is not relevant to discussions about the relative efficiency of nuclear reactors.

　　A.　TRUE

　　B.　UNTRUE

　　C. CANNOT SAY

　　3. If nuclear reactors were cheaper to build and decommission than fossil-fuelled power stations, they would definitely have the economic advantage.

　　A.　TRUE

　　B.　UNTRUE

　　C. CANNOT SAY

　　"At any given moment we are being bombarded by physical and psychological stimuli competing for our attention. Although our eyes are capable of handling more than 5 million bits of data per second, our brain are capable of interpreting only about 500 bits per second. With similar disparities between each of the other senses and the brain, it is easy to see that we must select the visual, auditory, or tactile stimuli that we wish to compute at any specific time."