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—How can you say so about my boss?
— Don’t get me wrong. I _____ ill of him.
A. won’t speak B. wasn’t speaking
C. haven’t spoken D. hadn’t spoken
查看习题详情和答案>>How Long Can People Live?
She took up skating at age 85, made her first movie appearance at age 114, and held a concert in the neighborhood on her 121at birthday.
When it comes to long life, Jeanne Calment is the world’s record holder. She lived to the ripe old age of 122. So is 122 the upper limit to the human life span(寿命)? If scientists come up with some sort of pill or diet that would slow aging, could we possibly make it to 150 or beyond?
Researchers don’t entirely agree on the answers. “Calment lived to 122, so it”
wouldn’t surprise me if someone alive today reaches 130 or 135," says Jerry Shay at the University of Texas.
Steve Austad at the University of Texas agrees."People can live much longer than we think," he says."Experts used to say that humans couldn't live past 110.When Calment blew past that age, they raised the number to 120.So why can't we go higher? "
The trouble with guessing how old people can live to be is that it's all just guessing."Anyone can make up a number," says Rich Miller at the University of Michigan."Usually the scientist who picks the highest number gets his name in Time magazine."
Won't new anti-aging techniques keep us alive for centuries? Any cure, says Miller, for aging would probably keep most of us kicking until about 120.Researchers are working on treatments that lengthen the life span of mice by 50 percent at most.So, if the average human life span is about 80 years, says Miller, "adding another 50 percent would get you to 120."
So what can.we conclude from this little disagreement among the researchers? That life span is flexible, but there is a limit, says George Martin of the University of Washington."We can get flies to live 50 percent longer," he says."But a fly's never going to live 150 years." Of course, if you became a new species, one that ages at a slower speed, that would be a different story, he adds.
Does Martin really believe that humans could evolve (进化) their way to longer life? "It's pretty cool to think about," he says with.a smile.
What does the story of Jeanne Calment prove to us?
A.People can live to 122.
B.Old people are creative,,
C.Women are sporty at 85.
D.Women live longer than men.
According to Steve Austad at the University of Texas, _____.
A.the average human life span could be 110
B.scientists cannot find ways to slow aging
C.few people can expect to live to over 150
D.researchers are not sure how long people can live
Who would agree that a scientist, will become famous if he makes the wildest guess at longevity?
A.Jerry Shay. B.Steve Austad C.Rich Miler D.George Martin
What can we infer from the last three paragraphs?
A.Most of us could be good at sports even at 150.
B.The average human life span cannot be doubled
C.Scientists believe mice are aging at a slower speed than before.
D.New techniques could be used to change flies into a new species
查看习题详情和答案>>How do you feel after you've stayed up late to finish schoolwork? Or the day after a slumber party? Scientists now say that your answers to these questions may depend on your genes.
Genes are stretches of DNA that work like an instruction manual for our cells. Genes tell our bodies and brains what to do. People have about 40,000 genes, and each gene can have different forms. So, for example, certain forms of some genes make your eyes blue. Other versions of those genes make your eyes brown.
In a similar way, new research suggests that a gene called period3 affects how well you function without sleep. The discovery adds to older evidence that period3 helps determine whether you like to stay up late or get up early.
The period3 gene comes in two forms: short and long. Everyone has two copies of the gene. So, you may have two longs, two shorts, or one of each. Your particular combination depends on what your parents passed on to you.
Scientists from the University of Surrey in England studied 24 people who had either two short or two long copies of period3. Study participants had to stay awake for 40 hours straight. Then, they took tests that measured how quickly they pushed a button when numbers flashed on a screen and how well they could remember lists of numbers.
Results showed that the people with the short form of period3 performed much better on these tests than the people with the long form did. In both groups, people performed worst in the early morning. That's the time when truck drivers and other night-shift workers say they have the most trouble concentrating.
After the first round of experiments, participants were finally allowed to sleep. People in the group that performed well on the tests took about 18 minutes to nod off.
People with the long period3 gene, by contrast, fell asleep in just 8 minutes. They also spent more time in deep sleep. That suggests that people with the long form of the gene need more and deeper sleep to keep their brains working at top form.
We can know from the passage that genes can not ________.
A. tell our bodies and brains what to do
B. make our eyes blue or brown
C. decide how well you work without sleep
D. ensure whether you’re good at driving
Which of the following statements about the period3 is wrong?
A. It affects whether you like to stay up late or get up early.
B. It comes in two forms: short and long.
C. One has either two longs or two shorts of it.
D. Your parents determine what particular combination you have.
People with the short form of period3__________.
A. need to go to bed early and get up early
B. can work better than the people with long form of period3 without sleep
C. take less time to fall asleep after they stay up late
D. need more and deeper sleep to keep their brains working at top form
What’s the best title of the passage?
A. The Period3 Gene B. The Function of Genes
C. Wake up, Sleepy Gene D. Stay up Late or Get up Early?
查看习题详情和答案>>How to Release Anger the Right Way
Anger is a feeling that many of us know all too well. Some of us experience it daily, 1 others hold on to it for years at a time. As you likely know, angry is not a healthy 2 . Over time it can become self-destructive, 3 relationships and even your health.
This is not to say that anger is always a 4 thing—anger is a natural part of living;it is a 5 that something is wrong. If anger is not a 6 normal and natural human emotion, it is 7 important to learn and understand how to 8 anger the right way.
You can release anger the right or the wrong way. 9 whether you have an anger problem yourself or not, it is 10 for everyone to understand what the right 11 of releasing anger are. Transforming anger is a powerful 12 to take that will create positive changes in our relationships. One of the best ways to 13 anger is to give yourself the 14 to express anger. In fact, it is quite 15 to express your anger as long as you do it 16 .
Remember that anger management 17 both on mental and physical effort. Although mental therapy alone will help you 18 for releasing your anger, it can only take you so far. The same 19 for exercise too. However, if you 20 both mental therapy and exercising, you will then have 21 to an unbelievable positive solution. Do a particular physical activity 22 the mental intention of releasing your anger.
It might be 23 but the most important things of all to 24 is to never hurt others when you release your anger. Make sure you give yourself the 25 to express safely your anger, without hurting anyone else .
1.A.when B.while C.but D.However
2.A.life B.feeling C.happiness D.emotion
3.A.reflecting B.ruining C.limiting D.satisfying
4.A.bad B.good C.ordinary D.especial
5.A.appearance B.mark C.signal D.gesture
6.A.unbelievable B.completely C.incompletely D.carefully
7.A.whatever B.how C.much D.however
8.A.release B.relax C.obsorb D.influence
9.A.Instead of B.Except for C.Regardless of D.As a consequence of
10.A.important B.common C.hard D.easy
11.A.answers B.messages C.ways D.actions
12.A.step B.right C.attitude D.chance
13.A.shift B.change C.transfer D.transform
14.A.permission B.application C.affection D.admission
15.A.painful B.happy C.healthy D.successful
16.A.confidently B.correctly C.gradually D.separately
17.A.requires B.relies C.lacks D.decline
18.A.attentively B.specially C.absolutely D.tremendously
19.A.arranges B.reaches C.prepares D.applies
20.A.control B.join C.separate D.combine
21.A.access B.approach C.admission D.contact
22.A.in conflict with B.rather than C.along with D.in place of
23.A.simple B.obvious C.unrealistic D.appropriate
24.A.answer B.remember C.repeat D.listen
25.A.opportunity B.necessity C.probability D.reality
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