Batteries can power anything from small sensors to large systems. While scientists are finding ways to make them smaller but even more powerful, problems can arise when these batteries are much larger and heavier than the devices themselves. University of Missouri(MU) researchers are developing a nuclear energy source that is smaller, lighter and more efficient.

“To provide enough power, we need certain methods with high energy density(密度)”，said Jae Kwon, assistant professor of electrical and computer engineering at MU. “The radioisotope(放射性同位素) battery can provide power density that is much higher than chemical batteries.”

Kwon and his research team have been working on building a small nuclear battery, presently the size and thickness of a penny, intended to power various micro / nanoelectromechanical systems (M/NEMS). Although nuclear batteries can cause concerns, Kwon said they are safe.

“People hear the word ‘nuclear’ and think of something very dangerous,” he said, “However, nuclear power sources have already been safely powering a variety of devices, such as pace-makers, space satellites and underwater systems.”

His new idea is not only in the battery’s size, but also in its semiconductor(半导体). Kwon’s battery uses a liquid semiconductor rather than a solid semiconductor.

“The key part of using a radioactive battery is that when you harvest the energy, part of the radiation energy can damage the lattice structure(晶体结构) of the solid semiconductor,” Kwon said, “By using a liquid semiconductor, we believe we can minimize that problem.”

Together with J. David Robertson, chemistry professor and associate director of the MU Research Reactor, Kwon is working to build and test the battery. In the future, they hope to increase the battery’s power, shrink its size and try with various other materials. Kwon said that battery could be thinner than the thickness of human hair.

1. Which of the following is true of Jae Kwon?

A. He teaches chemistry at MU. 

B. He developed a chemical battery.

C. He is working on a nuclear energy source.

D. He made a breakthrough in computer engineering.

2. Jae Kwon gave examples in Paragraph 4_________.

A. to show chemical batteries are widely applied.

B. to introduce nuclear batteries can be safely used.

C. to describe a nuclear-powered system.

D. to introduce various energy sources.

3. Liquid semiconductor is used to _________.

A. get rid of the radioactive waste  

B. test the power of nuclear batteries.

C. decrease the size of nuclear batteries

D. reduce the damage to lattice structure.

4. According to Jae Kwon, his nuclear battery _______.

A. uses a solid semiconductor       

B. will soon replace the present ones.

C. could be extremely thin          

D. has passed the final test.

5. The text is most probably a ________.

A. science news report        B. book review   

C. newspaper ad               D. science fiction story

Batteries can power anything from small sensors to large systems. While scientists are finding ways to make them smaller but even more powerful, problems can arise when these batteries are much larger and heavier than the devices themselves. University of Missouri(MU) researchers are developing a nuclear energy source that is smaller, lighter and more efficient.
“To provide enough power, we need certain methods with high energy density(密度)”，said Jae Kwon, assistant professor of electrical and computer engineering at MU. “The radioisotope(放射性同位素) battery can provide power density that is much higher than chemical batteries.”
Kwon and his research team have been working on building a small nuclear battery, presently the size and thickness of a penny, intended to power various micro/nanoelectromechanreal systems (M/NEMS). Although nuclear batteries can cause concerns, Kwon said they are safe.
“People hear the word ‘nuclear’ and think of something very dangerous,” he said, “However, nuclear power sources have already been safely powering a variety of devices, such as pace-makers, space satellites and underwater systems.”
His new idea is not only in the battery’s size, but also in its semiconductor(半导体). Kwon’s battery uses a liquid semiconductor rather than a solid semiconductor.
“The key part of using a radioactive battery is that when you harvest the energy, part of the radiation energy can damage the lattice structure(晶体结构) of the solid semiconductor,” Kwon said, “By using a liquid semiconductor, we believe we can minimize that problem.”
Together with J. David Robertson, chemistry professor and associate director of the MU Research Reactor, Kwon is working to build and test the battery. In the future, they hope to increase the battery’s power, shrink its size and try with various other materials. Kwon said that battery could be thinner than the thickness of human hair.
【小题1】Which of the following is true of Jae Kwon?

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。
Four Habits t0，Help You Succeed
We all want to succeed，whether it’s in losing weight or learning the guitar．For those who hay e tried and failed，success seems difficult to understand．Why does one person succeed while another person fails?       1   
1．Identify your core values．   
Finding your core values is in line with creating inner motivation．  2     Pick a handful of things and actually write them down．Remind yourself of your values every day，and reflect on whether you are honoring those values through your work．
2．Pick a goal and focus on it．
Choose one goal to start something large enough that will give you a sense of accomplishment，while adjusting well to your core values．Focus is key here.    3     If you perform many tasks at。a time，you might never complete your projects because they will take far too lon9．
3．Set a deadline for success．
Set a date for success．Identify when you hope to achieve your goal．    4     By setting a time limit，you are making the process more real．
4．     5       ．Failure can’t be avoided when you take risks, By its very definition，the desire to succeedmeans you are risking failure。Many people tend to give up far too early．Don’t fall into this trap! Remember your mindset earlier．Know it will happen．A failure is merely you working out the details，and learning what works and what doesn’t．Use failure．Treat it as a good thin9，and march on!

Batteries can power anything from small sensors to large systems. While scientists are finding ways to make them smaller but even more powerful, problems can arise when these batteries are much larger and heavier than the devices themselves. University of Missouri(MU) researchers are developing a nuclear energy source that is smaller, lighter and more efficient.

“To provide enough power, we need certain methods with high energy density(密度)”，said Jae Kwon, assistant professor of electrical and computer engineering at MU. “The radioisotope(放射性同位素) battery can provide power density that is much higher than chemical batteries.”

Kwon and his research team have been working on building a small nuclear battery, presently the size and thickness of a penny, intended to power various micro/nanoelectromechanreal systems (M/NEMS). Although nuclear batteries can cause concerns, Kwon said they are safe.

“People hear the word ‘nuclear’ and think of something very dangerous,” he said, “However, nuclear power sources have already been safely powering a variety of devices, such as pace-makers, space satellites and underwater systems.”

His new idea is not only in the battery’s size, but also in its semiconductor(半导体). Kwon’s battery uses a liquid semiconductor rather than a solid semiconductor.

“The key part of using a radioactive battery is that when you harvest the energy, part of the radiation energy can damage the lattice structure(晶体结构) of the solid semiconductor,” Kwon said, “By using a liquid semiconductor, we believe we can minimize that problem.”

Together with J. David Robertson, chemistry professor and associate director of the MU Research Reactor, Kwon is working to build and test the battery. In the future, they hope to increase the battery’s power, shrink its size and try with various other materials. Kwon said that battery could be thinner than the thickness of human hair.

Which of the following is true of Jae Kwon?

A. He teaches chemistry at MU.    

B. He developed a chemical battery.

C. He is working on a nuclear energy source.

D. He made a breakthrough in computer engineering.

Jae Kwon gave examples in Paragraph 4_________.

A. to show chemical batteries are widely applied. 

B. to introduce nuclear batteries can be safely used.

C. to describe a nuclear-powered system.       

D. to introduce various energy sources.

Liquid semiconductor is used to _________.

A. get rid of the radioactive waste         B. test the power of nuclear batteries.

C. decrease the size of nuclear batteries   D. reduce the damage to lattice structure.

According to Jae Kwon, his nuclear battery _______.

A. uses a solid semiconductor            B. will soon replace the present ones.

C. could be extremely thin           D. has passed the final test.

The text is most probably a ________.

A. science news report          B. book review   

C. newspaper ad            D. science fiction story

Mu Yumin had no idea that when he stopped by the computer club as a freshman looking for something fun, it would decide his career four years later．The 22 -year -old biology major at Huazhong  University of Science and Technology found a job as an IT technician in Shanghai．" My experience in the club gave me another 'diploma' ,"  said Mu．" More importantly, I found something I am good at and can make a living from．"

Now campuses(校园) around the country have started recruiting（吸收某人为新成员） fresh faces for all kinds of clubs．Upperclassmen and experts suggest a hobby-based choice of clubs, which might have a lasting impact（影响）on one' s life and career Zhang Ling did not get many chances to write stories as an environmental protection major at Jiangxi University of Science and Technology．But this changed when she joined the university broadcast station．Her daily interviews with students and teachers expanded her horizon．Now she is determined to become a journalist on environmental issues with her degree in environmental protection．"Journalism changed my life track," said the 22 –year-old girl．"I only wanted to be a science teacher in a local senior high school．But now I am applying for a graduate school in journalism."

Lan Yujie, professor at Anhui University of Technology, regards Mu and Zhang as good examples of choosing "what I like" instead of " what is practical" in finding jobs and seeking further study． "Some freshmen don't know what to choose," said Lan．"Just following a hobby and doing something you like can easily give you the experience that makes you happy and special．"

Lan further says that joining clubs should not necessarily have a purpose,  As part of campus life, a club experience will impact one's life and career m one way or another．"The point of clubs is to have as many diverse（多样的）experiences as possible so that students can explore more of their life," said Lan．

1.Why did Mu Yumin join the computer club?

A．To get another diplomA.             B．To change his major．

C．To find a good joB.                   D．To have a good time．

2.Which of the followings is true about Zhang Ling?

A.She didn't intend to be a journalist．

B.She changed her major to journalism．

C.She now works as a science teacher

D.She's graduated from the university．

3.According to the text, joining the campus club has many advantages EXCEPT          .

A．helping you know what you really like

B．making you plan your career better

C.helping you to make more friends

D.obtaining more life experiences

4.What can we learn from Lan Yujie's words in the last paragraph?

A．Club experiences will affect students' life and career

B.Students should be practical in finding jobs

C．Joining clubs should have a clear goal．

D．Students will have a colorful campus life by joining clubs．

5.What is the main idea of the text?

A．How to change your major．

B．Joining a campus club for a diploma．

C.How to find a job after graduation

D．Joining a club to explore more of your life．