The first time I questioned the traditional wisdom on the nature of a healthy diet，it was 40 years ago，and the subject was salt.Researchers found that salt supplementation（補(bǔ)充）was unnecessary after exercise，and this advice was passed on by health reporters.I recalled high school football practices in hot days.Without salt pills，I couldn't make it through a two-hour practice.
Although sports nutritionists have recommended consuming more salt when we sweat hard in physical activity，the message that we should avoid salt at all other times remains strong.And salt is still considered deadly.
So why have we been told that salt is so deadly？The advice has always sounded reasonable：Eat more salt，and your body keeps water to maintain a stable concentration of sodium（鈉）in your blood.This is why salty food might make us thirsty：We drink more；we keep water.The result can be a temporary increase in blood pressure.The scientific question is whether this temporary phenomenon leads to permanent problems：If we eat too much salt for years，does it cause high blood pressure，and then kill us？It makes sense，but it's only a hypothesis（假設(shè)），which hasn't been proved but unfortunately accepted as a fact.
In reality，eating less salt can worsen health.Decades ago，Italian researchers' study reported that reducing salt consumption increased the risk of dying early and that reducing sodium to a government-recommended "safe upper limit" is actually harmful.
Supporters of the eat-less-salt campaign（運(yùn)動(dòng)）tend to deal with this opposing evidence（證據(jù)）by implying that anyone raising it is a shill（同謀） for the food industry（widely criticized for adding salt to processed foods to improver taste）.When several government agencies held a hearing last November to discuss how to ensure Americans eat less salt，anti-salt supporters argued that the latest reports suggesting damage from lower-salt diets should simply be ignored.This attitude，which lacks respect for science，has been held for the anti-salt campaign for decades.Maybe now is the time for it to change.
（1）The underlined phrase in paragraph 1 refers to the belief that BB.
A．people should take in salt after exercise
B．salt intake was needless after physical activity
C．salt pills were helpful during football practices
D．a(chǎn) healthy diet does not necessarily include enough salt
（2）What does the Italian researchers' study show？ AA
A．Eating less salt can harm our health.
B．Eating too much salt raises blood pressure.
C．We should try to avoid salt on a daily basis.
D．We should follow the recommended "safe upper limit".
（3）What do the eat-less-salt campaigners do with the opposing evidence？ DD
A．They treat it with some respect.
B．They report it to the government agencies.
C．They do scientific experiments to support it.
D．They suggest that the food industry is behind it.
（4）What is the writer's attitude towards the anti-salt campaign？ DD
A．Supportive.
B．Unconcerned.
C．Puzzled.
D．Negative.
【考點(diǎn)】說明文．
【答案】B；A；D；D
【解答】
【點(diǎn)評(píng)】
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發(fā)布：2024/4/20 14:35:0組卷：16引用：1難度：0.7
相似題
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1．It is widely believed that biodiversity（生物多樣性）is promoted to save species.But in reality species exist only as part of ecosystems and cannot survive unless their ecosystems are protected along with as much as possible of the diversity they contain.
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 -
2．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（流行病）.
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Many students say they need to be in the US for more than attending cljye.ais.As a PhD student，the library is an extremely important resource for them，although it is because of COVED that those services have been closed，which means even this advantage is gone.
"You know more than 90% of the international students who were studying the US when COVID-19 hit and college campuses were closed have to remain in the US and this creates such trouble in their lives and such uncertainty that is unreasonable." said a lady from a university.
International students staving in the United States say the new ruling has disturbed their plans to return. "I know it is a fact that when it comes to rules，guidelines，laws and stuff like that，international students are sort of treated as low-level citizens.Even I can't even use the word "citizen" to begin with because that's what they make clear we are not."
The government said that the policy speaks for itself and that online coursework is not worth a visa.So far，not any sign of change has been within sight.As students are waiting for the policy to improve，their fall programming and their future remain in limbo.
（1）Why would international students prefer to stay in the US during the pandemic？
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 -
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We need the wild world.It is essential to our wellbeing，our health and our happiness.
（1）According to the author，people enjoyto seek nature.
A．jogging on the street
B．running in the gym
C．shopping in the supermarket
D．sitting in the garden
（2）From the second paragraph，we can see that.
A．Children don't want to approach nature
B．children probably spend less time in nature nowadays
C．climbing trees will certainly do good to the children
D．children tend to be happier as a result of their material satisfaction
（3）In what way do people benefit from their contact with nature？
A．Children with ADHD can be cured.
B．Children's performance at school is greatly improved.
C．Problems with crime and violent behavior will easily be solved.
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
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