Most people would agree that, although
our age exceeds all previous ages in knowledge, there has been no corresponding
increase in wisdom. But agreement ceases as soon as we attempt to define
"wisdom" and consider means of promoting it. There are several factors that
contribute to wisdom. Of these I should put first a sense of proportion: the
capacity to take account of all the important factors in a problem and to attach
to each its due weight. This has become more difficult than it used to be owing to the extent and complexity of the special knowledge required of various kinds of technicians. Suppose, for example, that you are engaged in research in scientific medicine. The work is difficult and is likely to absorb the whole of your mind. You have no time to consider the effect which your discoveries or inventions may have ou A. how much more wisdom we have now than before B. what wisdom is and how to develop it C. if there is a great increase of wisdom in our age D. whether wisdom can be developed or not [单项选择] Regeneration of Limbs
Most people would agree that it would be wonderful if humans could regenerate limbs. Those who have lost their arms or legs would be complete again. The day is still far off when this might happen. But in the last 10 years, doctors have reported regeneration in smaller parts of the body, most often fingers.
Regeneration is not a newly-discovered process. For centuries, scientists have seen it work in some kinds of animals. Break off a lizards (蜥蜴的) tail, for example, and it will grow a new tail. Scientists now are looking for a way to turn on this exciting ability in more highly-developed animals, including humans. Their experiments show that nerves, cell chemistry and the natural electric currents in the body all seem to have a part in this process.
The body of every animal contains general purpose cells that change into whatever kind of cells the body needs. Animals such as the lizard or salamander (蝾螈) use these cells
A. humans can never regenerate limbs B. human limbs may be regenerated on some animals first C. humans might be able to regenerate limbs in the future D. regeneration of human limbs will soon become a reality 我来回答: 提交
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