This 12-year-old Girl Built a Robot to Find Plastics in the Ocean Anna Du was walking along the beach when she noticed plastics there．She reached down to pick them up，and quickly realized there were many more tiny pieces than she could deal with．It seemed impossible to clean them all up．
Du，12 years old at the time，tried to solve the problem like any good scientist-first．by doing a little research．That's how she learned that 8 million tons of plastics end up in the oceans every year．
Then she got to work building something that could help solve the problem；a remote-operated vehicle（遙控潛水器），or ROV．Her ROV can move through water and find plastics on the ocean floor．
The actually cool part of Du's ROV is the detection（探測） system．She uses a camera along with three different kinds of light to find the plastics．She also uses visible（可見的） light to find unnatural colors that might make the plastics stand out．
"She has a very good engineering sense to break down a problem like this and then go after it，" says engineer Casey Machado． "It sounds simple，but it's a level of thinking that's really amazing．"
Du started attending public events and workshops at a university when she was five years old，and so she picked up the engineering skills necessary to build her ROV．She says actually getting her ROV to move through water well was not easy．She failed many times，but she never gave up trying and testing．
When asked about future plans，she mentions wanting to address the effects of climate（氣候）change．"I think there are a lot of problems that could be solved with new inventions，" says Du．
Du thanks her parents，who for years have taken her to student outreach activities，for supporting her interest in science，technology，engineering and math （STEM）．She says she has been able to meet students and scientists there．
"I know I want to be an engineer because I like building things to help solve world problems，" says Du．"But I'm not sure what kind of engineer I want to be yet．"
（1）What did Anna Du notice while walking along the beach？ She noticed plastics．She noticed plastics．
（2）How old was Du when she did a little research to solve the problem？ At the age of 12．/When she was 12 years old．At the age of 12．/When she was 12 years old．
（3）What can Du's ROV do？ It can move through water and find plastics on the ocean floor．It can move through water and find plastics on the ocean floor．
（4）Why does Du want to be an engineer in the future？ Because she likes building things to help solve world problems．Because she likes building things to help solve world problems．
（5）What made Du succeed in building her ROV？ Her good engineering sense to break down a problem，the engineering skills necessary to build it，her persistence（nor giving up） and her parents' support．另外答出 the careful observation，the awareness of protecting the oceans也可酌情給分Her good engineering sense to break down a problem，the engineering skills necessary to build it，her persistence（nor giving up） and her parents' support．另外答出 the careful observation，the awareness of protecting the oceans也可酌情給分
【答案】She noticed plastics．；At the age of 12．/When she was 12 years old．；It can move through water and find plastics on the ocean floor．；Because she likes building things to help solve world problems．；Her good engineering sense to break down a problem，the engineering skills necessary to build it，her persistence（nor giving up） and her parents' support．另外答出 the careful observation，the awareness of protecting the oceans也可酌情給分
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發(fā)布：2024/6/27 10:35:59組卷：174引用：7難度：0.5
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Puberty（青春期） is the process of life when young people leave childhood and move into adulthood.It is difficult for teenagers because puberty has an influence on both their minds and bodies.They need to understand what is going on with their bodies，how to deal with those changes and how to start taking responsibility for themselves.
Some young people may begin puberty at 8，while others may not start until 14 or 15.Usually，teenage girls start puberty two years before teenage boys do.For both boys and girls，it is usually complete by the age of 18.
During these years，the body develops in many ways.Feelings can also change quickly.
Teenage boys during puberty often begin to take unnecessary risks.Their attention is on having fun and being accepted.They like trying some challenging outdoor activities like skate boarding and rock climbing.So they need to think deeply before they act and make good decisions for themselves.
A girl's personality（個(gè)性）often doesn't develop in the same way as a boy's.Teenage girls sometimes don 't believe in themselves.They are no longer sure about their own feelings.However，they are usually afraid to tell their parents or teachers about their problems.For this reason，teenage girls should be encouraged to discuss things with trusted adults.
Parents，schools and communities can do a lot to care for and help young people.It is everyone's responsibility to help young people grow into healthy adults.
（1）Puberty is the process of life when young people grow from children to adults．
（2）During puberty，a teen's body develops in many ways，but feelings don't．
（3）Teenage boys during puberty enjoy some safe activities inside．
（4）It's better for teenage girls to discuss things with trusted adults during puberty．發(fā)布：2024/12/31 19:0:6組卷：2引用：1難度：0.4 -
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Honesty is where a good friendship starts.Friends must be able to trust one another.If you don't tell the truth，people usually find out.If a friend finds out that you haven't been honest，you may lose your friend's trust.（2）
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F.Good friends always trust one another to speak and act honestly.
G.Your friendship is very important to me.發(fā)布：2024/12/31 19:0:6組卷：3引用：1難度：0.4 -
3．Do you feel nervous when you talk to your parents？Do you easily make them angry？Don't worry. （1）
Find the common interests between you and your parents.For example，if you and your dad both like playing basketball，you can watch one game together and talk about it.（2）
Try to start a dinnertime talk with your parents.Ask your parents about their day，and they will open up to you easily.Don't forget that you have to open up to them，too.（3）Besides，it's also a good idea to share something about the latest movies.Soon all of you will have a good conversation.
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G.Here is some advice about how to talk to your parents.發(fā)布：2024/12/27 19:0:1組卷：77引用：7難度：0.4
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