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题型:阅读理解-阅读单选 难度:0.65 引用次数:53 题号:22504745

Songs that make our hearts happy can make them stronger too, US researchers reported on Tuesday.

They found that when people listened to their favorite music, their blood vessels (血管) dilated in much the same way as when they are laughing, or taking blood medications (药物治疗).

“We have a pretty impressive effect,” said Dr Michael Miller, director of preventive cardiology (心脏病学) at the University of Maryland Medical Center in Baltimore.

“Blood vessel diameter (直径) improved,” he said. “The vessel opened up pretty significantly. You can see the vessels opening up with other activities such as exercise.” A similar effect is seen with drugs such as statins (抑制素).

When blood vessels open up more, blood flows more smoothly and is less likely to form the clots (凝块) that cause heart attacks and strokes. “We are not saying to stop your statins or not to exercise but rather to add this to an overall program of heart health,” said Miller.

Miller’s team tested 10 healthy, non-smoking men and women, who were told to bring their favorite music. They spent half an hour listening to the recordings and half an hour listening to music they said made them feel anxious while the researchers did ultrasound (超声波) tests designed to show blood vessel function.

Compared to their normal baseline measurements, blood vessel diameter increased 26% on average when the volunteers heard their joyful music. Listening to music they disliked — in most cases in this group heavy metal-blood vessels narrowed by 6%, Miller said.

Miller said he came up with the idea after discovering that laughter caused blood to flow more smoothly. “I asked myself what other things make us feel good, besides calories from dark chocolate of course. Music came to mind. It makes me feel really good.” he said.

Most of the volunteers chose country music but Miller said the style is not so important as what pleases each individual.

1. The underlined word “dilate” in Paragraph 2 is closest in meaning to “________”.
A.widenB.moveC.changeD.increase
2. According to the passage, which of the following will NOT cause blood vessels to open up?
A.Taking exercise.B.Listening to unpleasant music.
C.Bursting into laughter.D.Taking drugs like statins.
3. It can be inferred from the passage that ________.
A.blood clots are caused by heart attacks and strokes
B.music is better than chocolate for your health
C.different music has different effects on different people
D.a person’s overall health is more influenced by how much exercise he gets
4. What is the passage possibly taken from?
A.A travel journal.B.A school textbook.
C.A medical brochure.D.A local newspaper.

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