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A black hole is an astronomical body Awhose gravity is so strong that nothing ca
A black hole is an astronomical body Awhose gravity is so strong that nothing ca
游客
2025-04-19
29
管理
问题
A black hole is an astronomical body A
whose gravity is so strong
that nothing can escape from it. It was Newton B
who
first stated that light C
is composed
of particles. The French mathematician De Laplace next reasoned that if enough mass D
was added to
a star like the sun, the gravitational force of the star would eventually prevent light particles from leaving it; it would therefore "blink out" and become an invisible black star.
选项
答案
D
解析
本题考查的是虚拟语气的用法,法国数学家解释的理由是假设的,与事实相反,用if引导虚拟语气的句子,所以此句要把was改成were来表达虚拟语气。句意是,黑洞是一个天体,它的引力很强大以至于没有任何东西可以逃脱黑洞的吸引。牛顿是第一个声明光是由粒子组成的。法国数学家De Laplace解释说,如果把足够的质量加到恒星上,如太阳,那么恒星的引力最终会使光粒子无法脱离恒星,从而变成一个看不见的黑色星球。所以正确答案是D选项。
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