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91．Koch's Favorite Fitness Apps
People spent money on gym memberships.But according to fitness and tech reporter Peter Koch，67 percent of them never went.It may be wise then to try a fitness app，many of which are more cost-effective than going to a health club.
Aaptiv
Aaptiv allows users to choose from a variety of different workouts，including stretching classes，yoga classes，boxing and weightlifting，according to Koch.It also provides guided audio（音頻） workouts，so there's no reason to look at a phone screen，he says.
Nike + Run Club
Nike + Run Club doesn't just track and log your runs with a GPS，Koch says，it also provides audio— guided runs. "I'm a runner myself since high school，and the one thing I see among inexperienced runners is that they tend to go out and run roughly the same distance at roughly the same pace every time，" Koch says. "It's easy to understand why their fitness might plateau or they might lose interest over time."
Fitbod
"What's really interesting about Fitbod is that it uses AI，or artificial intelligence，" explains Koch. "Every time you hit the weights，" he says， "it's not only guiding you step by step through each exercise—including the weight，number of sets and reps— but it also takes your performance from that day and uses it to adjust your plan going forward for upcoming sessions."
Keelo
Keelo is considered a smart program，meaning the app adjusts according to users' progress.The app centers on high-intensity interval training，looks at users' exercise history and adjust each workout accordingly，says Koch. "That's a huge aspect of these newer training apps，" he says. "They use this artificial intelligence."
（1）What type of app works best for a yoga lover？
A．Keelo.
B．Fitbod.
C．Aaptiv.
D．Nike + Run Club.
（2）Who would most probably download Nike + Run Club？
A．The new runners.
B．Marathon athletes.
C．Walkers.
D．Cyclists.
（3）What do the Fitbod and Keelo have in common？
A．They are designed for newcomers.
B．They learn from what you're doing.
C．They record users' health condition.
D．They offer many different workouts.發(fā)布：2024/12/11 20:30:5組卷：9引用：1難度：0.592．
As a chef，I tried to（1）A.episode B.vary C.commitment D.sink E.optimistic F.jye.ai the meals in whatever way，but it's really hard because we didn't find any vegetables or fruit.Our discipline and team spirit kept us （2）and helped us deal with our fears.This was an（3）in my life that I would never forget.When we were finally rescued，we felt such （4）and joy that many of us could not hide our tears.Shackleton paid us back by his （5）to save us from a slow but painful death.發(fā)布：2024/12/11 19:30:1組卷：3引用：1難度：0.593．
語言的魅力發(fā)布：2024/12/11 19:0:1組卷：1引用：1難度：0.794．取笑，戲弄
發(fā)布：2024/12/11 14:0:2組卷：3引用：5難度：0.595．We had
（the feeling of being sorry for someone who is in a bad situation）for those whose houses were damaged by the floods and donated money to them.發(fā)布：2024/12/11 13:30:2組卷：1引用：2難度：0.796．There was a time
I was crazy about computers games．發(fā)布：2024/12/11 11:0:2組卷：9引用：5難度：0.797．
vt.（仔細(xì)）檢查；審查；測驗(yàn)→n.考試；檢查；查問發(fā)布：2024/12/11 8:30:1組卷：3引用：2難度：0.698．James has just arrived，but I didn't know he
（come） until yesterday.發(fā)布：2024/12/11 7:0:2組卷：11引用：5難度：0.799．I felt excited that I was ________ to meet the visitors at the airport.（ ?。?/h2>
發(fā)布：2024/12/11 7:0:2組卷：58引用：11難度：0.8100．As global temperatures rise，trees around the world are experiencing longer growing seasons，sometimes as much as three extra weeks a year.All that time helps trees grow faster.For the past 100 years，trees have been experiencing fast growth in mild areas from Maryland to Finland，to Central Europe，where the growth rate of some trees has even sped up by nearly 77% since 1870.Supposing wood were just as strong today，those gains would mean more wood for building，burning，and storing carbon captured from the atmosphere.But is wood really as dense（茂密的） as it used to be？
Hans Pretzsch，a forest scientist at the Technical University of Munich in Germany，and his colleagues wanted to find an answer.They carried out a study of the forests of Central Europe.They started with small pieces of experimental land in southern Germany，some of which have been continuously monitored since 1870.Pretzsch and his team took core samples （樣品） from the trees — which included Norway spruce，sessile oak，European beech，and Scots pine — and analyzed the tree rings using a high-frequency probe.
They found that in all four species，wood density had decreased by 8% to 12%. "We expected a trend of the wood density like this，but not such a strong and significant decrease，" Pretzsch says.Increasing temperatures，and the faster growth they spur，probably account for some of the drop.Another factor，Pretzsch says，is more nitrogen in the soil from agricultural fertilizer and vehicle exhaust.Previous studies have linked increased fertilizer use to decreased wood density.Above all，the study suggests that the higher temperatures — combined with pollution from car exhaust and farms — are making wood weaker，resulting in trees that break more easily and wood that is less durable.
"I am getting worried，" says Richard Houghton，an ecologist at the Woods Hole Research Center in Falmouth，Massachusetts，who was not part of the new study.As the density of the samples dropped，so did their carbon content.That means forests may suffer more damage from storms and may be less efficient at soaking up（吸收） the greenhouse gas carbon dioxide （CO2） than scientists think，Houghton says.
（1）Paragraph 1 is written to.
A．prove an idea
B．introduce the topic
C．give an example
D．describe a fact
（2）What does the study show？
A．Farming slows trees' growth.
B．More areas are covered with forests.
C．Climate warming changes the quality of wood.
D．Pollution leads to higher temperatures.
（3）What does Richard Houghton mean？
A．Great loss might be caused.
B．Storm damage can be prevented.
C．The size of forests might be increased.
D．Less greenhouse gases can be sent out.
（4）What is the best title for the passage？
A．We only have one earth
B．Trees — our best friends
C．The influence of climate change
D．Trees are growing faster，but weaker發(fā)布：2024/12/11 7:0:2組卷：14引用：1難度：0.5
