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1、2021年高考英语二轮专题复习七选五04The Science of Risk-SeekingSometimes we decide that a little unnecessary danger is worth it because when we weigh the risk and the reward, the risk seems worth taking.（1）Some of us enjoy activities that would surprise and scare the rest of us. Why? Experts say it may have to do w
2、ith how our brains work.The reason why any of us take any risks at all might have to do with early humans. Risk-takers were better at hunting, fighting, or exploring. （2）As the quality of risk-taking was passed from one generation to the next, humans ended up with a sense of adventure and a toleranc
3、e for risk.So why arent we all jumping out of airplanes then? Well, even 200,000 years ago, too much risk-taking could get one killed. A few daring survived, though, along with a few stay-in-the-cave types. As a result, humans developed a range of character types that still exists today. So maybe yo
4、u love car racing, or maybe you hate it. （3）No matter where you are on the risk-seeking range, scientists say that your willingness to take risks increases during your teenage years. （4）To help you do that, your brain increases your hunger for new experiences. New experiences often mean taking some
5、risks, so your brain raises your tolerance for risk as well.（5）For the risk-seekers, a part of the brain related to pleasure becomes active, while for the rest of us, a part of the brain related to fear becomes active.As experts continue to study the science of risk-seeking, well continue to hit the
6、 mountains, the waves or the shallow end of the pool.A.It all depends on your character.B.Those are the risks you should jump to take.C.Being better at those things meant a greater chance of survival.D.Thus,these well-equipped people survived because they were the fittest.E.This is when you start to
7、 move away from your family and into the bigger world.F.However,we are not all using the same reference standard to weigh risks and rewards.G.New brain research suggests our brains work differently when we face a nervous situation.根据短文内容, 从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。Causes of sandstormsIn dese
8、rt areas, dust sandstorms are most common caused by either thunderstorm outflows, or by strong pressure gradients (气压梯度) which cause an increase in wind speed over a wide area. In some cases, dust and sand may set a limit to a shallow depth by a low-lying temperature change, （1） Drought is another c
9、ause of sandstorms, Poor farming practices make dust and sand free of protection from the wind. （2） A sandstorm can transport and carry large amounts of sand. Desert is a key source of sandstorms. Saharan sandstorms have increased about 10 times during the half century since the 1950s, causing topso
10、il loss in nearby countries. In Mauritania there were just two sandstorms a year in the early 1960s, but there are 80 a year today. （3） Sandstorms have also been shown to increase the spread of diseases across the globe. The virus In the dust is blown into the atmosphere by the storms. Some diseases
11、 may not be urgent at the very beginning, but they can develop into deadly ones if left untreated. （4） Sandstorms cause soil loss from the dry lands, doing harm to agriculture. Sandstorms also reduce visibility (能见度) affecting airplanes and road transportation, （5） Dust can also have good effects. C
12、entral and South American rainforests get most of their mineral nutrients from the Sahara; iron-poor ocean regions get iron.A. Effects of sandstorms.B. Bad results caused by sandstorms.C. People know little about the effects of sandstorms.D. In other cases, dust may be lifted as high as 6, 100 meter
13、s high.E. Dryland farming is one of the most serious practices.F. For example, a breathing problem can lead to lung cancer, while dry eyesG. In addition, sandstorms also discourage visitors from visiting these places, which will strike tourismWays to Help Your Teen Adjust to a New School In an ideal
14、 world,a teen could start and finish their schooling at the same school._（1）_.And while a move to a new city can be stressful for the entire family,it may be especially difficult for your teenager.Use these strategies to help your teen adjust to a new school. _（2）_The adjustment period begins before
15、 your teen ever steps foot into the new school.Point out the new opportunities thatll be available.If you have confidence that you can make it a new city or a new job,your teen will feel more confident about his ability to succeed in a new school. Listen to your teens concerns If you dont have an op
16、en relationship with your teen currently,now it is the time to build one.Its easiest to get him to open up when hes feeling unsure._（3）_.Is he worried about new teachers?Does he doubt his ability to make the basketball team?Talk about your reasons for moving _（4）_.If youre preparing for a better career opportunity,or you need to find a new
