A) nuclear mystery B) radiation detection C) radiation level D) nuclear radiation
37. Radiation can cause serious consequences even at the lowest level _________.
A) when it kills few cells
B) if it damages few cells
C) though the damaged cells can repair themselves
D) unless the damaged cells can reproduce themselves
38. The word “significant” in paragraph 3 most probably means _________.
A) remarkable B) meaningful C) fatal D) harmful
39. Radiation can hurt us in the way that it can _________.
A) kill large numbers of cells in main organs so as to cause death immediately.
B) damage cells which nay grow into cancer years later
C) affect the healthy growth of our offspring
D) All of the above.
40. Which of the following can be best inferred from the passage?
A) The importance of protection from radiation cannot be over-em-phasized.
B) The mystery about radiation remains unsolved.
C) Cancer is mainly caused by radiation.
D) Radiation can hurt those who are not aware of its danger.
Questions 41 to 45 are based on the following passage.
In some ways, the United States has made spectacular progress. Fires no longer destroy 18,000 buildings as they did in the Great Chicago Fire of i871 , or kill half a town of 2,400 people, as they did the same night in Peshtigo, Wisconsin. Other than the Beverly Hill Supper Club fire in Kentucky, in 1977, it has been four decades since more than 100 Americans died in a fire.
Bui even with such successes, the United States still has one of the worst fire death rates in the world. Safety experts say the problem is neither money nor technology, but the indifference of a country that just will not take Fires seriously enough.
American fire departments are some of the world's fastest and best equipped. They have to be. The United States has twice Japan's population, and 40 times as man`' Fires. It spends far less on preventing fires than on fighting them. American Fire-safety lessons are aimed almost entirely at children, who die in disproportionately large numbers in fires but who, contrary to popular myth, start very few of them.
Experts say the fatal error is an attitude that fires are not really anyone's fault. Thai is not so in other countries, where both public education and the law treat Fires as either a personal failing or a crime. Japan has many wood houses; of the estimated 48 fires in world history that burned more than 10,000 buildings, Japan has had 27. Penalties for by negligence can be as high as life imprisonment.
In the United States, most education dollars are spent in elementary schools . But the lessons are aimed at too limited an audience; just 9 percent of all Fire deaths are caused by children playing with matches.
The United States continues to rely more on technology than laws or social pressure. There are smoke detectors in 85 percent of all homes. Some local building codes now require home sprinklers. New heaters and irons shut themselves off if they are tipped. |
