A
(2020·河北省高三年级名校联考)
In elementary school，Glenn Cameron was very aware of the challenges faced by his friend，Roger，who had lost a hand.Now he has built an artificial helper for him.
The robotic hand is called “Dexi”．Each of its fingers can move independently.The strength and speed of the hand's“muscles” can be controlled.He's also created a digital version of this hand，which responds on a computer screen.Through a special headset，the system takes electrical signals from a human brain，sends them to a computer，and then the computer “ tells” the hand what to do.For example，to make the hand close，you “see” a fist in your head.
In fact，Cameron's first robotic hand was 3D printed online.Realizing the hand was too limited，he decided to build his own.It was quite a challenge，but his new version was better.It was also cheap，compared to many other robotic hand projects.Cameron says designing and building the hand was hard，but he went on.Then came the one Roger is using.
Cameron is working on a hand that can actually be used by a person who's lost a hand at present.He says the new hand will be simpler，because there won't be as much space.To make up for this，he's adding a mini camera and trying to make the hand smarter.
Cameron encourages young people who think they might want to do something demanding and similar，“ You just begin working towards it.Take one little step at a time，purposeful and steadfast，sooner or later you're going to get to the place you long for.”
语篇解读 在小学的时候，Glenn Cameron看到朋友缺少一只手，内心很受触动，他现在已经制造出了可以由人脑控制的机械手来帮助朋友。
1．Which version of the artificial hand does Dexi belong to?
A．The first. B．The second.
C．The third. D．The fourth.
C [考查推理判断。Dexi出现在第二段，但本题要结合上下文内容来推理才能得到答案。根据第一段的尾句和第二段的开头可知，Dexi是Roger现在使用的机械手版本。第三段谈到Cameron制作的第一个机械手是3D打印出来的，但他不满意。于是，他花费时间制造了第二个版本的机械手，这个版本比第一个要好。但他继续研发，于是便有了第三代机械手——Roger现在使用的Dexi。]
2．How could a user of the digital version of Dexi control the robotic hand?
A．By operating the computer.
B．By thinking.
C．By sending electrical signals to the hand.
D．By speaking.
B [考查细节理解。根据第二段的“Through a special headset...For example，to make the hand close，you ‘see’ a fist in your head”可知，Dexi的数字版本通过特殊的头部装置，收集大脑发出的电子信号并发送给电脑，电脑“告诉”机械手要做什么。比如，为了把手握起来，你可以在你的脑海中“看到”一个拳头。由此可推知，这个版本的机械手的使用者可以通过“想”来操作机械手。]
3．Which saying do Cameron's words convey?
A．Well begun is half done.
B．The longest journey begins with the first step.
C．All things are difficult before they are easy.
D．Nothing is impossible to a willing heart.
D [考查推理判断。最后一段谈到Cameron鼓励那些想做类似的费力的事情的年轻人：只要开始朝着它努力，一步一个脚印，坚定信念，迟早你会到达想去的地方，即实现目标。D项“Nothing is impossible to a willing heart”“有志者，事竟成”与他的话所表达的意思一致。]
4．What is the text mainly about?
A．Cameron's braincontrolled robotic hands.
B．Cameron's story of success.
C．The latest designs of artificial intelligence hands.
D．A robotic helper for the disabled.
A [考查主旨大意。全文主要谈了Cameron为帮助失去手的人设计和制造的机械手，故选A项。]
