题干

关于下列四个实验的认识中,正确的是(  )

A:实验现象说明电流周围存在磁场

B:通电螺线管右端为S极

C:实验研究的是通电导体在磁场中受到力的作用

D:实验研究的是电磁感应现象

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答案(点此获取答案解析)

A

同类题1

阅读《智能机器会超越人类吗?》,按要求答题。

    ①智能机器真的有可能超越人类吗?2016年3月15日,围棋“人机大战”第五场,“阿尔法围棋”以四比一的比分击败世界顶尖围棋高手九段李世石,这更激发了人们对人工智能的关注。

    ②的确,如果按照固定的程序进行预算,人脑的确赶不上人工智能。无论是国际象棋还是围棋,都是可以完全程序化的一种运动。如果我们问“阿尔法”一个简单的问题:“你赢了比赛开心吗?”它就不能像人一样笑着回答,因为它并不具备人类的情感,也不具备人脑的灵活性。不能解答任何程序设计范围之外的问题。

    ③现有机器和人最大的区别是什么?是人有智能,而现有机器并不具备真正的智能。严格的讲,智能机器只能执行特定的指令,而人则是处理所有感受到的信息。显然,执行指令与处理信息有着本质的不同。

    ④随着人工智能的不断发展,研究智能机器的专家也要懂得神经科学,以便模拟人脑的神经网络构造来连造仿生智能机器。当然,要建造这样一台仿生机器人的困难程度是难以想象的,因为人脑是世界上已知的最复杂,最神奇的“自动化机器”。人脑拥有1000亿个神经细胞,而每一个神经细胞都有数千个突触和其他神经细胞相连,神经细胞通过这些突触相互交流,一个三四岁的孩子大约有1000万亿个突触,到了成年大概稳定在100万亿个。

    ⑤也就是说。仿生机器人需要拥有1000万亿个可以独立运算的处理器,并具有100万亿个信息中转器。无论是制造原件还是整合这些元件,都是一个似乎难以完成的任务。更为可怕的是这些处理器及信息中转机要制成不同的类型。要完成仿生机器人的制造,需要最先进的纳米技术,才能把每个处理器做的像神经细胞那么小,它还需要最先进的超级计算机,才能完成对仿生机器人各个器件排列顺序的编程。

    ⑥因为世界上并不缺人,缺的是比人类某些性能更先进的机器。因此,科学家认为,未来的仿生机器人并非是要完全模仿人类的所有功能,而是模仿某项功能,这样仅仅需要模仿某个脑区就可以了,这就大大降低了制造难度,并可以强化某些功能,制造一些具有“特异功能”的电脑。(选文有改动)

同类题5

任务型阅读

Five ways to improve creativity

    Creativity is the ability to go beyond traditionally rules, ideas or relationships and create something new through imagination or progressiveness. There are many ways to improve your creative mind.

    Exercise the mind. Exercising your mind is an ideal way to boost creativity. Like the body, the mind needs exercise to work the creative muscles and make them stronger. Exercise your brain by learning new subjects, getting into a debate about politics and talking to other creative and intelligent people. ____

    Be Passionate. One aspect of creativity is passion. ____ Find you internal motivation and follow your passion to improve your creativity.

    Change your routine. ____ To boost your creativity, consider changing one to two elements of your daily routine. If you are working on a certain project, consider stopping one project to work on another project at regular interval throughout the day or week.

    Read. While reading provides many intellectual benefits, reading is also beneficial for boosting creativity, exercising your brain and provide creative inspiration. ____Consider reading about subjects that were previously uninteresting to you. This change in the norm might spark your creative interest.

    ____. Our packed schedules have no room for creative thinking. Take a certain amount of time every day to quiet, refresh and clear the mind while relaxing the body. This quiet .time can consist of a yoga workout, meditation or simply sitting still in a dark and quiet room, in a peaceful garden or on a beautiful beach.

A. Schedule quiet time.

B. It can become weak due to stresses.

C. Creativity is a natural quality.

D. Often, creativity is blocked due to a too-familiar routine.

E. These activities will encourage a flow of creativity.

F. Read as much as possible about several different subjects

G. Typically, students will do well in subjects they are interested in.