Albert Einstein is said to have been asked by a student, "What finding helped you most whe

The same【C4】______is told about Sir Isaac Newton and【C5】______other scientists. We have no proof【C6】______any of these well-known conversations【C7】______took place, but we are prepared to【C8】______that they did, and if so, that the【C9】______was the same one Einstein gave,【C10】______this is the way scientists work【C11】______science progresses.

Scientists usually work toward models of the process or structure they are studying.【C12】______we have models of the structure【C13】______the universe and of the atom, models of the process【C14】______which the genetic(遗传的)pattern is passed from one building block of life to【C15】______, models of the economic sys- tem and【C16】______on. Some models are mathematical, but a【C17】______does not have to have equations(方程式), or even diagrams; the【C18】______requirement is . no doubt that it【C19】______an insight(洞察力)into the relationships that determine【C20】______something works as it does or how it is put together.

【C1】

A．designing

B．inventing

C．revealing

D．developing