Recursos para estudiantes de inglés de todos los niveles, profesores y traductores. Para aprender o mejorar tu inglés en forma divertida.
Listening Comprehension - Comprensión Auditiva

Cómo realizar este ejercicio de comprensión auditiva

- Siempre encontrarás una pequeña introducción, que puede ayudarte a comprender el tema tratado.

- En los textos presentados se han ocultado algunas palabras, que deberás escribir en los casilleros correspondientes. A medida que lees el texto, escucha el audio con atención para descubrir dichas palabras.

- Quizás puedes deducir las palabras sin necesidad de escuchar el audio. Pero, pon atención al audio para confirmar si realmente se trata de la respuesta correcta.

- Puedes escuchar el audio cuantas veces sea necesario. Pero es recomendable hacerlo solamente dos veces (o tres veces como máximo) ya que esa es la forma en que normalmente se realizan estos ejercicios en exámenes y pruebas internacionales.

- Comprueba tus aciertos pulsando el botón "Corregir". Si no has podido completar todas las palabras, pulsa el botón "Solución" para ver cuáles eran las que te faltaban.

Among Vitamins, D Seems Short for 'Does a Lot'
Topic: Studies are finding that the vitamin known for building strong bones may also help prevent many diseases. Transcript of radio broadcast. Source: VOA

Escucha el audio y completa los recuadros.

This is the VOA Special English Health Report.

Vitamin D helps bones and grow strong and healthy. Low levels of vitamin D can lead to problems such as rickets, a deformity mainly found in . Osteoporosis, the thinning of bone, is a common problem as people, especially women, get older.

But more and more research is suggesting that vitamin D might also help many diseases.

The easiest way to get vitamin D is from . The sun's ultraviolet rays react with skin cells to produce vitamin D. But many people worry about getting skin cancer and skin damage from the . As a result they cover their skin or wear sunblock or stay out of the sun.Also, darker skinned people produce less vitamin D than lighter skinned . Production also decreases in older people and those living in northern that get less sunlight.

Not many foods naturally contain vitamin D. Foods high in this vitamin include oily fish such as salmon, and mackerel, and fish liver oils.

Boston University researchers reported last year that farmed salmon had only about one-fourth as much vitamin D as wild salmon.

Small amounts of D are found in beef liver, and egg yolks. And some people take dietary supplements containing the vitamin. But most of the vitamin D in the American diet comes from foods with D added, like .

In nineteen ninety-seven, the United States Institute of Medicine established levels for how much vitamin D healthy people need. It set the daily amount at two hundred international units from birth through age fifty. It set the level at four hundred I.U.s through age seventy, and six hundred for age seventy-one and over.

But some groups say these amounts are not enough. They are hoping that the new research findings will lead to new recommendations.

Research in the last several years has shown that levels of vitamin D may increase the risk of heart attacks in men and deaths from some cancers. Other studies have shown that people with rheumatic diseases often have low levels of vitamin D.

More doctors are now having their tested for their vitamin D levels. But as research continues, some experts worry that if people take too much vitamin D, it might act as a . Also, skin doctors warn people to be careful with sun exposure because of the risk of skin cancer.

And that's the VOA Special English Health Report, written by Caty Weaver. I'm Steve Ember.

Score:
   

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