搜题
题目
共用题干
Better Solar Energy Systems:More Heat,More Light
Solar photovoltaic（光电的）thermal energy systems , or PVTs , generate both heat and electricity , but
_________ (51)now they haven't been very good at the heat-generating part compared to a stand-alone
solar thermal collector. That ' s because they operate at low temperatures to cool crystalline silicon（晶体硅）
solar cells, _______(52)lets the silicon generate more electricity but isn't a very efficient way to gather
heat.
That's a problem of economics.Good solar hot-water systems can harvest much more energy than a
solar一electric system at a substantially lower _________(53).And it's also a space problem:photovoltaic
cells can
_________(54)up all the space on the roof,leaving little room for thermal applications.
In a pair of studies,Joshua Pearce,an associate professor of materials science and engineering,has de-
vised a_________(55)in the form of a better PVT made with a different kind of silicon.
Most solar panels are made with crystalline silicon,but you can also make solar cells out of amorphous
（非晶形的）silicon , commonly known
________( 56 ) thin-film silicon. They don ' t create as much elec-
tricity,but they are lighter,flexible,and cheaper. And,because they________(57)much less silicon,they
have a greener footprint._________(58),thin-film silicon solar cells are vulnerable to some bad一news
physics in the form of the Staebler-Wronski effect.
"That means that their efficiency drops when you_________(59)them to light一pretty much the worst
possible effect for a solar cell,"Pearce explains,which is one of the__________(60)thin-film solar panels
make up only a small fraction of the market.
However,Pearce and his team found a_______(61)to engineer around the Staebler-Wronski effect by
incorporating thin-film silicon in a new________(62)of PVT. You don't have to cool down thin-film sili-
con to make it work.In fact,Pearce's group discovered that by heating it to solar-thermal operating tempera-
tures,near the boiling_________(63)of water,they could make thicker cells that largely_________(64)
the Staebler-Wronski effect.When they applied the thin-film silicon directly to a solar thermal energy collector,
they also found that by baking the cell once a day,they_________(65)the solar cell's electrical efficiency
by over 10 percent.
_________(51)
A:unless
B:until
C:when
D:if
提示：未搜索到的试题可在搜索页快速提交，您可在会员中心"提交的题"快速查看答案。
答案
查看答案
搜题
相关试题
She tried to make up for her shabby treatment of him.
A:unforgettable
B:shoddy
C:unbelievable
D:unthinkable
A:unforgettable
B:shoddy
C:unbelievable
D:unthinkable
The industrial revolution modified the whole structure of English society.
A:smashed
B:destroyed
C:broke
D:changed
A:smashed
B:destroyed
C:broke
D:changed
共用题干
Better Solar Energy Systems:More Heat,More Light
Solar photovoltaic（光电的）thermal energy systems , or PVTs , generate both heat and electricity , but
_________ (51)now they haven't been very good at the heat-generating part compared to a stand-alone
solar thermal collector. That ' s because they operate at low temperatures to cool crystalline silicon（晶体硅）
solar cells, _______(52)lets the silicon generate more electricity but isn't a very efficient way to gather
heat.
That's a problem of economics.Good solar hot-water systems can harvest much more energy than a
solar一electric system at a substantially lower _________(53).And it's also a space problem:photovoltaic
cells can
_________(54)up all the space on the roof,leaving little room for thermal applications.
In a pair of studies,Joshua Pearce,an associate professor of materials science and engineering,has de-
vised a_________(55)in the form of a better PVT made with a different kind of silicon.
Most solar panels are made with crystalline silicon,but you can also make solar cells out of amorphous
（非晶形的）silicon , commonly known
________( 56 ) thin-film silicon. They don ' t create as much elec-
tricity,but they are lighter,flexible,and cheaper. And,because they________(57)much less silicon,they
have a greener footprint._________(58),thin-film silicon solar cells are vulnerable to some bad一news
physics in the form of the Staebler-Wronski effect.
"That means that their efficiency drops when you_________(59)them to light一pretty much the worst
possible effect for a solar cell,"Pearce explains,which is one of the__________(60)thin-film solar panels
make up only a small fraction of the market.
However,Pearce and his team found a_______(61)to engineer around the Staebler-Wronski effect by
incorporating thin-film silicon in a new________(62)of PVT. You don't have to cool down thin-film sili-
con to make it work.In fact,Pearce's group discovered that by heating it to solar-thermal operating tempera-
tures,near the boiling_________(63)of water,they could make thicker cells that largely_________(64)
the Staebler-Wronski effect.When they applied the thin-film silicon directly to a solar thermal energy collector,
they also found that by baking the cell once a day,they_________(65)the solar cell's electrical efficiency
by over 10 percent.
_________(64)
A:promoted
B:overcame
C:improved
D:assessed
Better Solar Energy Systems:More Heat,More Light
Solar photovoltaic（光电的）thermal energy systems , or PVTs , generate both heat and electricity , but
_________ (51)now they haven't been very good at the heat-generating part compared to a stand-alone
solar thermal collector. That ' s because they operate at low temperatures to cool crystalline silicon（晶体硅）
solar cells, _______(52)lets the silicon generate more electricity but isn't a very efficient way to gather
heat.
That's a problem of economics.Good solar hot-water systems can harvest much more energy than a
solar一electric system at a substantially lower _________(53).And it's also a space problem:photovoltaic
cells can
_________(54)up all the space on the roof,leaving little room for thermal applications.
In a pair of studies,Joshua Pearce,an associate professor of materials science and engineering,has de-
vised a_________(55)in the form of a better PVT made with a different kind of silicon.
Most solar panels are made with crystalline silicon,but you can also make solar cells out of amorphous
（非晶形的）silicon , commonly known
________( 56 ) thin-film silicon. They don ' t create as much elec-
tricity,but they are lighter,flexible,and cheaper. And,because they________(57)much less silicon,they
have a greener footprint._________(58),thin-film silicon solar cells are vulnerable to some bad一news
physics in the form of the Staebler-Wronski effect.
"That means that their efficiency drops when you_________(59)them to light一pretty much the worst
possible effect for a solar cell,"Pearce explains,which is one of the__________(60)thin-film solar panels
make up only a small fraction of the market.
However,Pearce and his team found a_______(61)to engineer around the Staebler-Wronski effect by
incorporating thin-film silicon in a new________(62)of PVT. You don't have to cool down thin-film sili-
con to make it work.In fact,Pearce's group discovered that by heating it to solar-thermal operating tempera-
tures,near the boiling_________(63)of water,they could make thicker cells that largely_________(64)
the Staebler-Wronski effect.When they applied the thin-film silicon directly to a solar thermal energy collector,
they also found that by baking the cell once a day,they_________(65)the solar cell's electrical efficiency
by over 10 percent.
_________(64)
A:promoted
B:overcame
C:improved
D:assessed
共用题干
The iPad
1 The iPad is a tablet computer（平板电脑）designed and developed by Apple. It is particularly mar-
keted as a platform for audio and visual media such as books,periodicals,movies,music,and games,as well
as web content.At about 1.5 pounds(680 grams),its size and weight are between those of most contempora-
ry smartphones and laptop computers.Apple released the iPad in April 2010,and sold 3 million of the de-
vices in 80 days.
2 The iPad runs the same operating system as iPod Touch and iPhone.It can run its own applications
as well as ones developed for iPhone.Without modification,it will only run programs approved by Apple and
distributed via its online store.
3 Like iPhone and iPod Touch,the iPad is controlled by a multitouch display一a break from most pre-
vious tablet computers , which uses a pressure-triggered stylus（触控笔）.The iPad uses a Wi-Fi data connec-
tion to browse（浏览）the Internet, load and stream media ,and install software. Some models also have a 3G
wireless data connection which can connect to GSM 3 G data networks.The device is managed and synchro-
nized by iTunes on a personal computer via USB cable.
4 An iPad has different features and applications one can use to execute different and interesting
things.There are lots of iPad applications that the owner can use to enhance the way they communicate.Some
of these are how to use social networking sites and other online options.One of the most common uses is for
e-mail services.iPad applications like Markdown Mail allow the adoption of specific and particular options.
They enable the owner to personalize their email accounts.
5 While the iPad is mostly used by consumers it also has been taken up by business users.Some com-
panies are adopting iPads in their business offices by distributing or making available iPads to employees.Ex-
amples of uses in the workplace include lawyers responding to clients,medical professionals accessing health
records during patient exams,and managers approving employee requests.A survey by Frost&Sullivan shows
that iPad usage in workplaces is linked to the goals of increased employee productivity,reduced paperwork,
and increased revenue.
Paragraph 5_________
A:Features and Applications
B:Display and Data Connection
C:Online Stores
D:Differences from iPhone
E:Business Usage
F:Operating System
The iPad
1 The iPad is a tablet computer（平板电脑）designed and developed by Apple. It is particularly mar-
keted as a platform for audio and visual media such as books,periodicals,movies,music,and games,as well
as web content.At about 1.5 pounds(680 grams),its size and weight are between those of most contempora-
ry smartphones and laptop computers.Apple released the iPad in April 2010,and sold 3 million of the de-
vices in 80 days.
2 The iPad runs the same operating system as iPod Touch and iPhone.It can run its own applications
as well as ones developed for iPhone.Without modification,it will only run programs approved by Apple and
distributed via its online store.
3 Like iPhone and iPod Touch,the iPad is controlled by a multitouch display一a break from most pre-
vious tablet computers , which uses a pressure-triggered stylus（触控笔）.The iPad uses a Wi-Fi data connec-
tion to browse（浏览）the Internet, load and stream media ,and install software. Some models also have a 3G
wireless data connection which can connect to GSM 3 G data networks.The device is managed and synchro-
nized by iTunes on a personal computer via USB cable.
4 An iPad has different features and applications one can use to execute different and interesting
things.There are lots of iPad applications that the owner can use to enhance the way they communicate.Some
of these are how to use social networking sites and other online options.One of the most common uses is for
e-mail services.iPad applications like Markdown Mail allow the adoption of specific and particular options.
They enable the owner to personalize their email accounts.
5 While the iPad is mostly used by consumers it also has been taken up by business users.Some com-
panies are adopting iPads in their business offices by distributing or making available iPads to employees.Ex-
amples of uses in the workplace include lawyers responding to clients,medical professionals accessing health
records during patient exams,and managers approving employee requests.A survey by Frost&Sullivan shows
that iPad usage in workplaces is linked to the goals of increased employee productivity,reduced paperwork,
and increased revenue.
Paragraph 5_________
A:Features and Applications
B:Display and Data Connection
C:Online Stores
D:Differences from iPhone
E:Business Usage
F:Operating System
共用题干
Why Would They Falsely Confess?
Why on earth would an innocent person falsely confess to committing a crime?To most
people,it just doesn't seem logical .But it is logical,say experts,if you understand what
can happen in a police interrogation（审讯）room.
Under the right conditions, people's minds are susceptible（易受影响的）to influence, and t
he pressure put on suspects during police grillings（盘问）is enormous.________(1)
"The pressure is important to understand,because otherwise it's impossible to understand why
someone would say he did something he didn't do.The answer is:to put an end to an
uncomfortable situation that will continue until he does confess."
Developmental psychologist Allison Redlich recently conducted a laboratory study to
determine how likely people are to confess to things they didn't do.________(2)The
researchers then intentionally crashed the computers and accused the participants of hitting
the"alt"key to see if they would sign a statement falsely taking responsibility.
Redlich's findings clearly demonstrate how easy it can be to get people to falsely
confess : 59 percent of the young adults in the experiment immediately comfessd.
__________ (3) Of the 15 to 16 year olds, 72 percent signed confessions ,as did 78
percent of the 1 2-to-1 3-year olds.
"There's no question that young people are more at risk, " says Saul Kassin, a
psychology professor at Williams College,who has done similar studies with similar results.
________(4)
Both Kassin and Redlich note that the entire"interrogation"in their experiments
consisted of a simple accusation一not hours of aggressive questioning一and still,most
participants falsely confessed.
Because of the stress of a police interrogation,they conclude,suspects can become
convinced that falsely confessing is the easiest way out of a bad situation.________(5)
_________（4）
A:In her experiment,participants were seated at computers and told not to hit the"alt" key,because doing so would crash the systems.
B:"In some ways,"says Kassin,"false confession becomes a rational decision."
C:" It's a little like somebody's working on them with a dental（牙齿的）drill," says Franklin Zimring,a law professor at the University of California at Berkeley.
D:"But adults are highly vulnerable too."
E:How could an innocent person admit to doing something he didn't do?
F:Redlich also found that the younger the participant,the more likely a false confession.
Why Would They Falsely Confess?
Why on earth would an innocent person falsely confess to committing a crime?To most
people,it just doesn't seem logical .But it is logical,say experts,if you understand what
can happen in a police interrogation（审讯）room.
Under the right conditions, people's minds are susceptible（易受影响的）to influence, and t
he pressure put on suspects during police grillings（盘问）is enormous.________(1)
"The pressure is important to understand,because otherwise it's impossible to understand why
someone would say he did something he didn't do.The answer is:to put an end to an
uncomfortable situation that will continue until he does confess."
Developmental psychologist Allison Redlich recently conducted a laboratory study to
determine how likely people are to confess to things they didn't do.________(2)The
researchers then intentionally crashed the computers and accused the participants of hitting
the"alt"key to see if they would sign a statement falsely taking responsibility.
Redlich's findings clearly demonstrate how easy it can be to get people to falsely
confess : 59 percent of the young adults in the experiment immediately comfessd.
__________ (3) Of the 15 to 16 year olds, 72 percent signed confessions ,as did 78
percent of the 1 2-to-1 3-year olds.
"There's no question that young people are more at risk, " says Saul Kassin, a
psychology professor at Williams College,who has done similar studies with similar results.
________(4)
Both Kassin and Redlich note that the entire"interrogation"in their experiments
consisted of a simple accusation一not hours of aggressive questioning一and still,most
participants falsely confessed.
Because of the stress of a police interrogation,they conclude,suspects can become
convinced that falsely confessing is the easiest way out of a bad situation.________(5)
_________（4）
A:In her experiment,participants were seated at computers and told not to hit the"alt" key,because doing so would crash the systems.
B:"In some ways,"says Kassin,"false confession becomes a rational decision."
C:" It's a little like somebody's working on them with a dental（牙齿的）drill," says Franklin Zimring,a law professor at the University of California at Berkeley.
D:"But adults are highly vulnerable too."
E:How could an innocent person admit to doing something he didn't do?
F:Redlich also found that the younger the participant,the more likely a false confession.