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A hearing aid is a small electronic device you wear in or behind your ear to make sounds louder.A hearing aid has three basic parts：a microphone，an amplifier and a speaker.The hearing aid receives sound through a microphone，which changes the sound waves to electrical signals and sends them to an amplifier.The amplifier increases the power of the signals and sends them to the ear through a speaker.There are three styles of hearing aids.
●Behind-the-ear（BTE） aids are used by people of all ages."Mini" BTE is a new kind.These small and open-fit aids fit behind the ear completely，with a narrow tube into the ear canal，enabling the can al to remain open.Thus，some people prefer it because their own voice does not sound"plugged up".
●In-the-ear（ITE） aids fit completely inside the outer ear.Some ITE aids may have added features，such as a telecoil that allows users to receive sound through the circuitry of the hearing aid，rather than through its microphone.
●Canal aids fit into the ear canal and are available in two styles.In-the-canal （ITC） aids are made to fit the size and shape of the ear canal.Completely-in-canal（CIC） aids are hidden in the ear canal.
The hearing aid that will work best for you depends on your hearing needs and lifestyle.Price is also a key consideration.However，just because one hearing aid is more expensive than another does not necessarily mean that it will better suit your needs.Other features to consider include parts or services covered by the guarantee，estimated costs for repair，and the hearing aid company's reputation for quality and service.
For more information，contact：nidcdinfo@nidcd.nih.gov .
（1）What helps strengthen the power of electrical signals in a hearing aid？ BB
A.The microphone.
B.The amplifier.
C.The speaker.
D.The telecoil.
（2）If preferring a hearing aid that keeps the ear canal open，you can choose AA.
A. "Mini"BTE
B.In-the-ear aids
C.In-the-canal aids
D.Completely-in-canal aids
（3）To buy a suitable hearing aid，you should DD.
A.increase your estimated costs
B.find the one with more features
C.give in to the after-sale services
D.consider your needs and lifestyle
【答案】B；A；D
【解答】
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發(fā)布：2024/10/5 4:0:2組卷：4引用：1難度：0.5
相似題
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Protecting habitats（棲息地）is important for keeping biodiversity.In 2003，over 102，000 habitats covering nearly 19 million square kilometres，or 11.5% of the world's land surface，were under some form of protection.Though this is a great improvement since 1962，when just 1，000 protected habitats were listed，it is still not considered enough to stop the ecocide that is endangering the world's biodiversity.
For a number of environmentalist，protecting the world's 25 biodiversity hotspots（熱點(diǎn)地區(qū)）is critical to saving habitats and species.But many hotspots are endangered already，having lost up to three-quarters of their original plants.
The poor state of most biodiversity hotspots results directly from population growth and migration（遷移） into these areas.A study found that by the mid-1990s around 1.1 billion people lived in these hotspots.Moreover，the annual population growth rate in these areas was 1.8%，higher than the global average of 1.4%.The PAI report concluded that human-related environmental changes will continue to put pressure on hotspots.Therefore，keeping biodiversity requires paying close attention to population size.
Protecting hotspots is not simply a matter of putting up fences and employing guards.The best results are achieved when local people are educated about the value of wildlife，and actually gain a share of the benefits from eco-tourism.Only then do they have a chance to see the benefits of protecting hotpots.
（1）What can we infer from paragraph 1？
A．The loss of any species can affect humans.
B．Endangered species are paid more attention to by humans.
C．Species can still survive when their ecosystems are destroyed.
D．Ecosystem protection is as important as diversity protection.
（2）What does the underlined word "ecocide" in paragraph 2 mean？
A．Ecosystem protection.
B．Reduction of the number of species.
C．Serious damage to habitats.
D．Habitats protection.
（3）What's the direct cause of the terrible state of the hotspots？
A．Population growth in hotpots.
B．Migration out of these areas.
C．Global warming.
D．The global average population growth rate.
（4）What's the author's opinion on protecting the hotspots？
A．It's simple to carry out.
B．It leads to the increase of tourists.
C．It's closely connected with local people.
D．It suggests that the local people are well educated.發(fā)布：2025/1/6 16:30:6組卷：0引用：1難度：0.5 -
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（1）According to the author，people enjoyto seek nature.
A．jogging on the street
B．running in the gym
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（2）From the second paragraph，we can see that.
A．Children don't want to approach nature
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D．A garden nearby improves the quality of old people's life.
（4）what is the main idea of this passage？
A．Access to nature improves our life.
B．Nature treats children for ADHD.
C．Getting close to nature reduces crime.
D．Man can't live without natural areas.發(fā)布：2025/1/6 16:30:6組卷：0引用：1難度：0.5 -
3．International students who stayed in the US as their classes moved online during the COVID may be forced to leave，following guidelines of the US Immigration and Customs Enforcement published due to the pandemic（流行?。?
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A．They couldn't delay the program for a year.
B．They can make full use of the library resource.
C．They wouldn't bring any potential danger to their family.
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（2）What do international students staying in the United States think of the new rule？
A．The new rule treats them as American citizens.
B．The new rule shows great unreasonable opinion against them.
C．The new rule guides them to plan to return to the US.
D．The new rule treats them like low-level students in school.
（3）What is the government's attitude towards the new rule？
A．Favorable.
B．Neutral（中立）.
C．Unfavorable.
D．Unclear.
（4）What does the underlined phrase "in limbo" in the last paragraph mean？
A．Horrible.
B．Flexible.
C．Uncertain.
D．Unbelievable.發(fā)布：2025/1/6 15:30:8組卷：0引用：1難度：0.5