题型:阅读理解 题类: 难易度:普通
陕西省咸阳市2024届高三下学期高考模拟(三)英语试卷(音频暂未更新)
Spending all day glued to your smartphone probably isn't doing you any favors. Too much phone use has been linked with a range of concems, including sleep issues, joint pain and even relationship problems. But if it's radiation you're worried about, experts say you don't have to ditch your phone.
"There's no risk of anything hazardous or dangerous with radiation from cellphones, "said Gayle Woloschak, an associate dean and professor of radiology at the Northwesterm Univerity Feinberg School of Medicine. As with all cellphones, along with Wi-Fi networks, radio stations, remote controls and GPS, smartphones do send out radiation, said Emily Caffrey, an assistant professor of health physics at the University of Alabama at Birningham. They use invisible energy waves to transmit voices, texts, photos and emails to nearby cell towers, which can carry them to almost anywhere in the world. But nearly three decades of scientific research has not linked such exposures to medical issues like cancer, health authorities including the Food and Drug Administration say. Here's what we know.
"Radiation"describes many types of energy, some of which do carry risks, explained Dr. Howard Fine, director of the Brain Tumor Center at NewYork —Presbyterian Weill Cornell Medical Center in New York City, "It is often sent out from radioactive substances", Atomic bombs, or, to a far lesser degree, X-ray machines, send out energy called ionizing radiation that in high enough or frequent enough amount can damage DNA and cause cancer, Dr. Fine said.
But smartphone energy falls into a category called non-ionizing radiation, Dr. Caffrey said, which isn't powerful enough to cause this damage. "A lot of people think‘radiation is radiation, 'but it's not all the same, "Dr. Woloschak said. "There's no DNA damage seen from cellphone use. "
Most experts and health authorities like the F. D. A. and World Health Organization agree that there's no evidence that smartphone radiation causes health problems. Still, several studies over the years have made headlines for suggesting their links to brain diseases. Many of these studies have since been proved to be false, Dr. Fine said, including those focused on fifth-generation.
Lao Gan Ma Black Bean Chilli Sauce
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79 customer reviews
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About the Product:
Net Weight: 9. 88 oz(280g)
Ingredients: Soybean, Chilli, Canola Oil, Salt, Sugar, Monosodium Glutamate, Sulfur Dixide, Sodium Sulfate.
BEWARE!! This hot sauce has peanuts in it. Watch out for that if you have or you know people with allergies (过敏).
This chilli sauce certainly adds a lot of flavor to dishes. It goes literally with everything, ramen, dumplings, noodles, rice dishes, and tons of other stuff.
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Color: Black(with tracker)
This product is for Xiaomi Mi4/M3, Miui Iphone 4s/5/5c/5s/6/6Plus, Samsung and Other Smart Phone with Android System 4.4 above.
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