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2026年2月托福机经套卷(第3套)Read an Academic Passage5 道题

Electromagnetic Healing

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Electromagnetic Healing Advances in traumatology have highlighted the potential of electromagnetic fields (EMFs) in promoting bone healing. EMFs, invisible areas of energy produced by electrically charged objects, are recognized for their therapeutic benefits. Researchers have found that specific EMF frequencies can stimulate cellular activity, enhancing bone repair. Unlike traditional treatments such as metal implants and bone grafts, EMF therapy is non-invasive and produces few side effects. In clinical studies, patients with non-healing fractures exposed to EMFs showed significant improvement. One study showed that EMFs reduced recovery time by accelerating healing by up to 50 percent, a significant difference for patients with conditions that impede natural healing. █ Multiple mechanisms driven by EMFs have been identified as contributing to bone healing, yet the complete picture is not fully understood. █ Some scientists believe that EMFs enhance the production of substances known as growth factors, which include essential proteins for cell growth and repair. █ Others note that EMFs improve blood circulation to the damaged area, facilitating nutrient delivery and waste removal. Researchers are uncertain of how the mechanisms interact, the optimal parameters (frequency, intensity, duration) for therapies, and the relation between the amount of a treatment and the magnitude of the effect it produces. █
Question 1查看单题
The word "promoting" in the passage is closest in meaning to
Adelaying
Bsupporting
Cpreventing
Dobserving
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正确答案：B
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Question 2查看单题
What does the passage suggest about traditional treatments for bone injury?
AThey produce significant side effects.
BThey are generally non-invasive.
CThey require metal implants more often than they require bone grafts.
DThey stimulate cellular activity more effectively than does EMF therapy.
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正确答案：A
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Question 3查看单题
Why does the author discuss "One study"?
ATo point out that EMF therapy has been used in 50 percent of cases in which bone healing was needed
BTo demonstrate that EMF therapy is relatively effective
CTo show how the effects of EMF therapy change over time
DTo suggest that patients with unusual conditions might prefer traditional treatments
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正确答案：B
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Question 4查看单题
The passage mentions which of the following as being unknown about the EMF-driven mechanisms that contribute to bone healing?
AWhether growth factors include proteins for cell repair
BHow improved blood circulation facilitates nutrient delivery
CHow the mechanisms interact to achieve their effect
DWhat impedes the mechanisms from working
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正确答案：C
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Question 5查看单题
There are four locations █ in the passage that indicate where the following sentence could be added.
They also disagree about why responses vary among individual patients and what the long-term effects of EMF therapies may be.
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